20324840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{443}}^1$

素因数の和:522

約数の個数: 64

約数和(自身を含む): 48591360

約数和(自身を除く): 28266520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 62, 74, 124, 148, 155, 185, 248, 296, 310, 370, 443, 620, 740, 886, 1147, 1240, 1480, 1772, 2215, 2294, 3544, 4430, 4588, 5735, 8860, 9176, 11470, 13733, 16391, 17720, 22940, 27466, 32782, 45880, 54932, 65564, 68665, 81955, 109864, 131128, 137330, 163910, 274660, 327820, 508121, 549320, 655640, 1016242, 2032484, 2540605, 4064968, 5081210, 10162420, 20324840]

約数ペア:

[(1, 20324840), (2, 10162420), (4, 5081210), (5, 4064968), (8, 2540605), (10, 2032484), (20, 1016242), (31, 655640), (37, 549320), (40, 508121), (62, 327820), (74, 274660), (124, 163910), (148, 137330), (155, 131128), (185, 109864), (248, 81955), (296, 68665), (310, 65564), (370, 54932), (443, 45880), (620, 32782), (740, 27466), (886, 22940), (1147, 17720), (1240, 16391), (1480, 13733), (1772, 11470), (2215, 9176), (2294, 8860), (3544, 5735), (4430, 4588)]