21501720

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{463}}^1$

素因数の和:526

約数の個数: 128

約数和(自身を含む): 73497600

約数和(自身を除く): 51995880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 43, 45, 54, 60, 72, 86, 90, 108, 120, 129, 135, 172, 180, 215, 216, 258, 270, 344, 360, 387, 430, 463, 516, 540, 645, 774, 860, 926, 1032, 1080, 1161, 1290, 1389, 1548, 1720, 1852, 1935, 2315, 2322, 2580, 2778, 3096, 3704, 3870, 4167, 4630, 4644, 5160, 5556, 5805, 6945, 7740, 8334, 9260, 9288, 11112, 11610, 12501, 13890, 15480, 16668, 18520, 19909, 20835, 23220, 25002, 27780, 33336, 39818, 41670, 46440, 50004, 55560, 59727, 62505, 79636, 83340, 99545, 100008, 119454, 125010, 159272, 166680, 179181, 199090, 238908, 250020, 298635, 358362, 398180, 477816, 500040, 537543, 597270, 716724, 796360, 895905, 1075086, 1194540, 1433448, 1791810, 2150172, 2389080, 2687715, 3583620, 4300344, 5375430, 7167240, 10750860, 21501720]

約数ペア:

[(1, 21501720), (2, 10750860), (3, 7167240), (4, 5375430), (5, 4300344), (6, 3583620), (8, 2687715), (9, 2389080), (10, 2150172), (12, 1791810), (15, 1433448), (18, 1194540), (20, 1075086), (24, 895905), (27, 796360), (30, 716724), (36, 597270), (40, 537543), (43, 500040), (45, 477816), (54, 398180), (60, 358362), (72, 298635), (86, 250020), (90, 238908), (108, 199090), (120, 179181), (129, 166680), (135, 159272), (172, 125010), (180, 119454), (215, 100008), (216, 99545), (258, 83340), (270, 79636), (344, 62505), (360, 59727), (387, 55560), (430, 50004), (463, 46440), (516, 41670), (540, 39818), (645, 33336), (774, 27780), (860, 25002), (926, 23220), (1032, 20835), (1080, 19909), (1161, 18520), (1290, 16668), (1389, 15480), (1548, 13890), (1720, 12501), (1852, 11610), (1935, 11112), (2315, 9288), (2322, 9260), (2580, 8334), (2778, 7740), (3096, 6945), (3704, 5805), (3870, 5556), (4167, 5160), (4630, 4644)]