685100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:75

約数の個数: 72

約数和(自身を含む): 1749888

約数和(自身を除く): 1064788

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 25, 26, 31, 34, 50, 52, 62, 65, 68, 85, 100, 124, 130, 155, 170, 221, 260, 310, 325, 340, 403, 425, 442, 527, 620, 650, 775, 806, 850, 884, 1054, 1105, 1300, 1550, 1612, 1700, 2015, 2108, 2210, 2635, 3100, 4030, 4420, 5270, 5525, 6851, 8060, 10075, 10540, 11050, 13175, 13702, 20150, 22100, 26350, 27404, 34255, 40300, 52700, 68510, 137020, 171275, 342550, 685100]

約数ペア:

[(1, 685100), (2, 342550), (4, 171275), (5, 137020), (10, 68510), (13, 52700), (17, 40300), (20, 34255), (25, 27404), (26, 26350), (31, 22100), (34, 20150), (50, 13702), (52, 13175), (62, 11050), (65, 10540), (68, 10075), (85, 8060), (100, 6851), (124, 5525), (130, 5270), (155, 4420), (170, 4030), (221, 3100), (260, 2635), (310, 2210), (325, 2108), (340, 2015), (403, 1700), (425, 1612), (442, 1550), (527, 1300), (620, 1105), (650, 1054), (775, 884), (806, 850)]