20684750

素因数分解:

$2^1\times 5^3\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 42591744

約数和(自身を除く): 21906994

約数列:

[1, 2, 5, 10, 17, 25, 31, 34, 50, 62, 85, 125, 155, 157, 170, 250, 310, 314, 425, 527, 775, 785, 850, 1054, 1550, 1570, 2125, 2635, 2669, 3875, 3925, 4250, 4867, 5270, 5338, 7750, 7850, 9734, 13175, 13345, 19625, 24335, 26350, 26690, 39250, 48670, 65875, 66725, 82739, 121675, 131750, 133450, 165478, 243350, 333625, 413695, 608375, 667250, 827390, 1216750, 2068475, 4136950, 10342375, 20684750]

約数ペア:

[(1, 20684750), (2, 10342375), (5, 4136950), (10, 2068475), (17, 1216750), (25, 827390), (31, 667250), (34, 608375), (50, 413695), (62, 333625), (85, 243350), (125, 165478), (155, 133450), (157, 131750), (170, 121675), (250, 82739), (310, 66725), (314, 65875), (425, 48670), (527, 39250), (775, 26690), (785, 26350), (850, 24335), (1054, 19625), (1550, 13345), (1570, 13175), (2125, 9734), (2635, 7850), (2669, 7750), (3875, 5338), (3925, 5270), (4250, 4867)]