19878375

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:169

約数の個数: 64

約数和(自身を含む): 37140480

約数和(自身を除く): 17262105

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 61, 75, 79, 125, 165, 183, 237, 275, 305, 375, 395, 671, 825, 869, 915, 1185, 1375, 1525, 1975, 2013, 2607, 3355, 4125, 4345, 4575, 4819, 5925, 7625, 9875, 10065, 13035, 14457, 16775, 21725, 22875, 24095, 29625, 50325, 53009, 65175, 72285, 83875, 108625, 120475, 159027, 251625, 265045, 325875, 361425, 602375, 795135, 1325225, 1807125, 3975675, 6626125, 19878375]

約数ペア:

[(1, 19878375), (3, 6626125), (5, 3975675), (11, 1807125), (15, 1325225), (25, 795135), (33, 602375), (55, 361425), (61, 325875), (75, 265045), (79, 251625), (125, 159027), (165, 120475), (183, 108625), (237, 83875), (275, 72285), (305, 65175), (375, 53009), (395, 50325), (671, 29625), (825, 24095), (869, 22875), (915, 21725), (1185, 16775), (1375, 14457), (1525, 13035), (1975, 10065), (2013, 9875), (2607, 7625), (3355, 5925), (4125, 4819), (4345, 4575)]