18201220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 42086016

約数和(自身を除く): 23884796

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 47, 67, 68, 85, 94, 134, 170, 188, 235, 268, 289, 335, 340, 470, 578, 670, 799, 940, 1139, 1156, 1340, 1445, 1598, 2278, 2890, 3149, 3196, 3995, 4556, 5695, 5780, 6298, 7990, 11390, 12596, 13583, 15745, 15980, 19363, 22780, 27166, 31490, 38726, 53533, 54332, 62980, 67915, 77452, 96815, 107066, 135830, 193630, 214132, 267665, 271660, 387260, 535330, 910061, 1070660, 1820122, 3640244, 4550305, 9100610, 18201220]

約数ペア:

[(1, 18201220), (2, 9100610), (4, 4550305), (5, 3640244), (10, 1820122), (17, 1070660), (20, 910061), (34, 535330), (47, 387260), (67, 271660), (68, 267665), (85, 214132), (94, 193630), (134, 135830), (170, 107066), (188, 96815), (235, 77452), (268, 67915), (289, 62980), (335, 54332), (340, 53533), (470, 38726), (578, 31490), (670, 27166), (799, 22780), (940, 19363), (1139, 15980), (1156, 15745), (1340, 13583), (1445, 12596), (1598, 11390), (2278, 7990), (2890, 6298), (3149, 5780), (3196, 5695), (3995, 4556)]