21127275

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1$

素因数の和:293

約数の個数: 72

約数和(自身を含む): 42247296

約数和(自身を除く): 21120021

約数列:

[1, 3, 5, 9, 13, 15, 25, 31, 39, 45, 65, 75, 93, 117, 155, 195, 225, 233, 279, 325, 403, 465, 585, 699, 775, 975, 1165, 1209, 1395, 2015, 2097, 2325, 2925, 3029, 3495, 3627, 5825, 6045, 6975, 7223, 9087, 10075, 10485, 15145, 17475, 18135, 21669, 27261, 30225, 36115, 45435, 52425, 65007, 75725, 90675, 93899, 108345, 136305, 180575, 227175, 281697, 325035, 469495, 541725, 681525, 845091, 1408485, 1625175, 2347475, 4225455, 7042425, 21127275]

約数ペア:

[(1, 21127275), (3, 7042425), (5, 4225455), (9, 2347475), (13, 1625175), (15, 1408485), (25, 845091), (31, 681525), (39, 541725), (45, 469495), (65, 325035), (75, 281697), (93, 227175), (117, 180575), (155, 136305), (195, 108345), (225, 93899), (233, 90675), (279, 75725), (325, 65007), (403, 52425), (465, 45435), (585, 36115), (699, 30225), (775, 27261), (975, 21669), (1165, 18135), (1209, 17475), (1395, 15145), (2015, 10485), (2097, 10075), (2325, 9087), (2925, 7223), (3029, 6975), (3495, 6045), (3627, 5825)]