19662680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:300

約数の個数: 64

約数和(自身を含む): 46414080

約数和(自身を除く): 26751400

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 101, 124, 155, 157, 202, 248, 310, 314, 404, 505, 620, 628, 785, 808, 1010, 1240, 1256, 1570, 2020, 3131, 3140, 4040, 4867, 6262, 6280, 9734, 12524, 15655, 15857, 19468, 24335, 25048, 31310, 31714, 38936, 48670, 62620, 63428, 79285, 97340, 125240, 126856, 158570, 194680, 317140, 491567, 634280, 983134, 1966268, 2457835, 3932536, 4915670, 9831340, 19662680]

約数ペア:

[(1, 19662680), (2, 9831340), (4, 4915670), (5, 3932536), (8, 2457835), (10, 1966268), (20, 983134), (31, 634280), (40, 491567), (62, 317140), (101, 194680), (124, 158570), (155, 126856), (157, 125240), (202, 97340), (248, 79285), (310, 63428), (314, 62620), (404, 48670), (505, 38936), (620, 31714), (628, 31310), (785, 25048), (808, 24335), (1010, 19468), (1240, 15857), (1256, 15655), (1570, 12524), (2020, 9734), (3131, 6280), (3140, 6262), (4040, 4867)]