20280975

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:129

約数の個数: 96

約数和(自身を含む): 41330688

約数和(自身を除く): 21049713

約数列:

[1, 3, 5, 11, 13, 15, 25, 31, 33, 39, 55, 61, 65, 75, 93, 143, 155, 165, 183, 195, 275, 305, 325, 341, 403, 429, 465, 671, 715, 775, 793, 825, 915, 975, 1023, 1209, 1525, 1705, 1891, 2013, 2015, 2145, 2325, 2379, 3355, 3575, 3965, 4433, 4575, 5115, 5673, 6045, 8525, 8723, 9455, 10065, 10075, 10725, 11895, 13299, 16775, 19825, 20801, 22165, 24583, 25575, 26169, 28365, 30225, 43615, 47275, 50325, 59475, 62403, 66495, 73749, 104005, 110825, 122915, 130845, 141825, 218075, 270413, 312015, 332475, 368745, 520025, 614575, 654225, 811239, 1352065, 1560075, 1843725, 4056195, 6760325, 20280975]

約数ペア:

[(1, 20280975), (3, 6760325), (5, 4056195), (11, 1843725), (13, 1560075), (15, 1352065), (25, 811239), (31, 654225), (33, 614575), (39, 520025), (55, 368745), (61, 332475), (65, 312015), (75, 270413), (93, 218075), (143, 141825), (155, 130845), (165, 122915), (183, 110825), (195, 104005), (275, 73749), (305, 66495), (325, 62403), (341, 59475), (403, 50325), (429, 47275), (465, 43615), (671, 30225), (715, 28365), (775, 26169), (793, 25575), (825, 24583), (915, 22165), (975, 20801), (1023, 19825), (1209, 16775), (1525, 13299), (1705, 11895), (1891, 10725), (2013, 10075), (2015, 10065), (2145, 9455), (2325, 8723), (2379, 8525), (3355, 6045), (3575, 5673), (3965, 5115), (4433, 4575)]