20687580

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{263}}^1$

素因数の和:320

約数の個数: 144

約数和(自身を含む): 69189120

約数和(自身を除く): 48501540

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 23, 30, 36, 38, 45, 46, 57, 60, 69, 76, 90, 92, 95, 114, 115, 138, 171, 180, 190, 207, 228, 230, 263, 276, 285, 342, 345, 380, 414, 437, 460, 526, 570, 684, 690, 789, 828, 855, 874, 1035, 1052, 1140, 1311, 1315, 1380, 1578, 1710, 1748, 2070, 2185, 2367, 2622, 2630, 3156, 3420, 3933, 3945, 4140, 4370, 4734, 4997, 5244, 5260, 6049, 6555, 7866, 7890, 8740, 9468, 9994, 11835, 12098, 13110, 14991, 15732, 15780, 18147, 19665, 19988, 23670, 24196, 24985, 26220, 29982, 30245, 36294, 39330, 44973, 47340, 49970, 54441, 59964, 60490, 72588, 74955, 78660, 89946, 90735, 99940, 108882, 114931, 120980, 149910, 179892, 181470, 217764, 224865, 229862, 272205, 299820, 344793, 362940, 449730, 459724, 544410, 574655, 689586, 899460, 1034379, 1088820, 1149310, 1379172, 1723965, 2068758, 2298620, 3447930, 4137516, 5171895, 6895860, 10343790, 20687580]

約数ペア:

[(1, 20687580), (2, 10343790), (3, 6895860), (4, 5171895), (5, 4137516), (6, 3447930), (9, 2298620), (10, 2068758), (12, 1723965), (15, 1379172), (18, 1149310), (19, 1088820), (20, 1034379), (23, 899460), (30, 689586), (36, 574655), (38, 544410), (45, 459724), (46, 449730), (57, 362940), (60, 344793), (69, 299820), (76, 272205), (90, 229862), (92, 224865), (95, 217764), (114, 181470), (115, 179892), (138, 149910), (171, 120980), (180, 114931), (190, 108882), (207, 99940), (228, 90735), (230, 89946), (263, 78660), (276, 74955), (285, 72588), (342, 60490), (345, 59964), (380, 54441), (414, 49970), (437, 47340), (460, 44973), (526, 39330), (570, 36294), (684, 30245), (690, 29982), (789, 26220), (828, 24985), (855, 24196), (874, 23670), (1035, 19988), (1052, 19665), (1140, 18147), (1311, 15780), (1315, 15732), (1380, 14991), (1578, 13110), (1710, 12098), (1748, 11835), (2070, 9994), (2185, 9468), (2367, 8740), (2622, 7890), (2630, 7866), (3156, 6555), (3420, 6049), (3933, 5260), (3945, 5244), (4140, 4997), (4370, 4734)]