21706425

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{181}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 43127448

約数和(自身を除く): 21421023

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 41, 45, 65, 75, 117, 123, 181, 195, 205, 225, 325, 369, 533, 543, 585, 615, 905, 975, 1025, 1599, 1629, 1845, 2353, 2665, 2715, 2925, 3075, 4525, 4797, 7059, 7421, 7995, 8145, 9225, 11765, 13325, 13575, 21177, 22263, 23985, 35295, 37105, 39975, 40725, 58825, 66789, 96473, 105885, 111315, 119925, 176475, 185525, 289419, 333945, 482365, 529425, 556575, 868257, 1447095, 1669725, 2411825, 4341285, 7235475, 21706425]

約数ペア:

[(1, 21706425), (3, 7235475), (5, 4341285), (9, 2411825), (13, 1669725), (15, 1447095), (25, 868257), (39, 556575), (41, 529425), (45, 482365), (65, 333945), (75, 289419), (117, 185525), (123, 176475), (181, 119925), (195, 111315), (205, 105885), (225, 96473), (325, 66789), (369, 58825), (533, 40725), (543, 39975), (585, 37105), (615, 35295), (905, 23985), (975, 22263), (1025, 21177), (1599, 13575), (1629, 13325), (1845, 11765), (2353, 9225), (2665, 8145), (2715, 7995), (2925, 7421), (3075, 7059), (4525, 4797)]