20115225

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{23}}^2$

素因数の和:88

約数の個数: 81

約数和(自身を含む): 40783197

約数和(自身を除く): 20667972

約数列:

[1, 3, 5, 9, 13, 15, 23, 25, 39, 45, 65, 69, 75, 115, 117, 169, 195, 207, 225, 299, 325, 345, 507, 529, 575, 585, 845, 897, 975, 1035, 1495, 1521, 1587, 1725, 2535, 2645, 2691, 2925, 3887, 4225, 4485, 4761, 5175, 6877, 7475, 7605, 7935, 11661, 12675, 13225, 13455, 19435, 20631, 22425, 23805, 34385, 34983, 38025, 39675, 58305, 61893, 67275, 89401, 97175, 103155, 119025, 171925, 174915, 268203, 291525, 309465, 447005, 515775, 804609, 874575, 1341015, 1547325, 2235025, 4023045, 6705075, 20115225]

約数ペア:

[(1, 20115225), (3, 6705075), (5, 4023045), (9, 2235025), (13, 1547325), (15, 1341015), (23, 874575), (25, 804609), (39, 515775), (45, 447005), (65, 309465), (69, 291525), (75, 268203), (115, 174915), (117, 171925), (169, 119025), (195, 103155), (207, 97175), (225, 89401), (299, 67275), (325, 61893), (345, 58305), (507, 39675), (529, 38025), (575, 34983), (585, 34385), (845, 23805), (897, 22425), (975, 20631), (1035, 19435), (1495, 13455), (1521, 13225), (1587, 12675), (1725, 11661), (2535, 7935), (2645, 7605), (2691, 7475), (2925, 6877), (3887, 5175), (4225, 4761)]