20986875

素因数分解:

$3^2\times 5^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:87

約数の個数: 120

約数和(自身を含む): 47759712

約数和(自身を除く): 26772837

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 25, 35, 39, 41, 45, 63, 65, 75, 91, 105, 117, 123, 125, 175, 195, 205, 225, 273, 287, 315, 325, 369, 375, 455, 525, 533, 585, 615, 625, 819, 861, 875, 975, 1025, 1125, 1365, 1435, 1575, 1599, 1625, 1845, 1875, 2275, 2583, 2625, 2665, 2925, 3075, 3731, 4095, 4305, 4375, 4797, 4875, 5125, 5625, 6825, 7175, 7875, 7995, 8125, 9225, 11193, 11375, 12915, 13125, 13325, 14625, 15375, 18655, 20475, 21525, 23985, 24375, 25625, 33579, 34125, 35875, 39375, 39975, 46125, 55965, 56875, 64575, 66625, 73125, 76875, 93275, 102375, 107625, 119925, 167895, 170625, 179375, 199875, 230625, 279825, 322875, 333125, 466375, 511875, 538125, 599625, 839475, 999375, 1399125, 1614375, 2331875, 2998125, 4197375, 6995625, 20986875]

約数ペア:

[(1, 20986875), (3, 6995625), (5, 4197375), (7, 2998125), (9, 2331875), (13, 1614375), (15, 1399125), (21, 999375), (25, 839475), (35, 599625), (39, 538125), (41, 511875), (45, 466375), (63, 333125), (65, 322875), (75, 279825), (91, 230625), (105, 199875), (117, 179375), (123, 170625), (125, 167895), (175, 119925), (195, 107625), (205, 102375), (225, 93275), (273, 76875), (287, 73125), (315, 66625), (325, 64575), (369, 56875), (375, 55965), (455, 46125), (525, 39975), (533, 39375), (585, 35875), (615, 34125), (625, 33579), (819, 25625), (861, 24375), (875, 23985), (975, 21525), (1025, 20475), (1125, 18655), (1365, 15375), (1435, 14625), (1575, 13325), (1599, 13125), (1625, 12915), (1845, 11375), (1875, 11193), (2275, 9225), (2583, 8125), (2625, 7995), (2665, 7875), (2925, 7175), (3075, 6825), (3731, 5625), (4095, 5125), (4305, 4875), (4375, 4797)]