20840040

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:164

約数の個数: 192

約数和(自身を含む): 75151440

約数和(自身を除く): 54311400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 26, 30, 36, 39, 40, 45, 52, 60, 61, 65, 72, 73, 78, 90, 104, 117, 120, 122, 130, 146, 156, 180, 183, 195, 219, 234, 244, 260, 292, 305, 312, 360, 365, 366, 390, 438, 468, 488, 520, 549, 584, 585, 610, 657, 730, 732, 780, 793, 876, 915, 936, 949, 1095, 1098, 1170, 1220, 1314, 1460, 1464, 1560, 1586, 1752, 1830, 1898, 2190, 2196, 2340, 2379, 2440, 2628, 2745, 2847, 2920, 3172, 3285, 3660, 3796, 3965, 4380, 4392, 4453, 4680, 4745, 4758, 5256, 5490, 5694, 6344, 6570, 7137, 7320, 7592, 7930, 8541, 8760, 8906, 9490, 9516, 10980, 11388, 11895, 13140, 13359, 14235, 14274, 15860, 17082, 17812, 18980, 19032, 21960, 22265, 22776, 23790, 26280, 26718, 28470, 28548, 31720, 34164, 35624, 35685, 37960, 40077, 42705, 44530, 47580, 53436, 56940, 57096, 57889, 66795, 68328, 71370, 80154, 85410, 89060, 95160, 106872, 113880, 115778, 133590, 142740, 160308, 170820, 173667, 178120, 200385, 231556, 267180, 285480, 289445, 320616, 341640, 347334, 400770, 463112, 521001, 534360, 578890, 694668, 801540, 868335, 1042002, 1157780, 1389336, 1603080, 1736670, 2084004, 2315560, 2605005, 3473340, 4168008, 5210010, 6946680, 10420020, 20840040]

約数ペア:

[(1, 20840040), (2, 10420020), (3, 6946680), (4, 5210010), (5, 4168008), (6, 3473340), (8, 2605005), (9, 2315560), (10, 2084004), (12, 1736670), (13, 1603080), (15, 1389336), (18, 1157780), (20, 1042002), (24, 868335), (26, 801540), (30, 694668), (36, 578890), (39, 534360), (40, 521001), (45, 463112), (52, 400770), (60, 347334), (61, 341640), (65, 320616), (72, 289445), (73, 285480), (78, 267180), (90, 231556), (104, 200385), (117, 178120), (120, 173667), (122, 170820), (130, 160308), (146, 142740), (156, 133590), (180, 115778), (183, 113880), (195, 106872), (219, 95160), (234, 89060), (244, 85410), (260, 80154), (292, 71370), (305, 68328), (312, 66795), (360, 57889), (365, 57096), (366, 56940), (390, 53436), (438, 47580), (468, 44530), (488, 42705), (520, 40077), (549, 37960), (584, 35685), (585, 35624), (610, 34164), (657, 31720), (730, 28548), (732, 28470), (780, 26718), (793, 26280), (876, 23790), (915, 22776), (936, 22265), (949, 21960), (1095, 19032), (1098, 18980), (1170, 17812), (1220, 17082), (1314, 15860), (1460, 14274), (1464, 14235), (1560, 13359), (1586, 13140), (1752, 11895), (1830, 11388), (1898, 10980), (2190, 9516), (2196, 9490), (2340, 8906), (2379, 8760), (2440, 8541), (2628, 7930), (2745, 7592), (2847, 7320), (2920, 7137), (3172, 6570), (3285, 6344), (3660, 5694), (3796, 5490), (3965, 5256), (4380, 4758), (4392, 4745), (4453, 4680)]