20380280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:129

約数の個数: 96

約数和(自身を含む): 51060240

約数和(自身を除く): 30679960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 41, 43, 68, 82, 85, 86, 136, 164, 170, 172, 205, 215, 289, 328, 340, 344, 410, 430, 578, 680, 697, 731, 820, 860, 1156, 1394, 1445, 1462, 1640, 1720, 1763, 2312, 2788, 2890, 2924, 3485, 3526, 3655, 5576, 5780, 5848, 6970, 7052, 7310, 8815, 11560, 11849, 12427, 13940, 14104, 14620, 17630, 23698, 24854, 27880, 29240, 29971, 35260, 47396, 49708, 59245, 59942, 62135, 70520, 94792, 99416, 118490, 119884, 124270, 149855, 236980, 239768, 248540, 299710, 473960, 497080, 509507, 599420, 1019014, 1198840, 2038028, 2547535, 4076056, 5095070, 10190140, 20380280]

約数ペア:

[(1, 20380280), (2, 10190140), (4, 5095070), (5, 4076056), (8, 2547535), (10, 2038028), (17, 1198840), (20, 1019014), (34, 599420), (40, 509507), (41, 497080), (43, 473960), (68, 299710), (82, 248540), (85, 239768), (86, 236980), (136, 149855), (164, 124270), (170, 119884), (172, 118490), (205, 99416), (215, 94792), (289, 70520), (328, 62135), (340, 59942), (344, 59245), (410, 49708), (430, 47396), (578, 35260), (680, 29971), (697, 29240), (731, 27880), (820, 24854), (860, 23698), (1156, 17630), (1394, 14620), (1445, 14104), (1462, 13940), (1640, 12427), (1720, 11849), (1763, 11560), (2312, 8815), (2788, 7310), (2890, 7052), (2924, 6970), (3485, 5848), (3526, 5780), (3655, 5576)]