21284775

素因数分解:

$3^4\times 5^2\times {\mathrm{23}}^1\times {\mathrm{457}}^1$

素因数の和:502

約数の個数: 60

約数和(自身を含む): 41230992

約数和(自身を除く): 19946217

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 81, 115, 135, 207, 225, 345, 405, 457, 575, 621, 675, 1035, 1371, 1725, 1863, 2025, 2285, 3105, 4113, 5175, 6855, 9315, 10511, 11425, 12339, 15525, 20565, 31533, 34275, 37017, 46575, 52555, 61695, 94599, 102825, 157665, 185085, 262775, 283797, 308475, 472995, 788325, 851391, 925425, 1418985, 2364975, 4256955, 7094925, 21284775]

約数ペア:

[(1, 21284775), (3, 7094925), (5, 4256955), (9, 2364975), (15, 1418985), (23, 925425), (25, 851391), (27, 788325), (45, 472995), (69, 308475), (75, 283797), (81, 262775), (115, 185085), (135, 157665), (207, 102825), (225, 94599), (345, 61695), (405, 52555), (457, 46575), (575, 37017), (621, 34275), (675, 31533), (1035, 20565), (1371, 15525), (1725, 12339), (1863, 11425), (2025, 10511), (2285, 9315), (3105, 6855), (4113, 5175)]