20980480

素因数分解:

$2^8\times 5^1\times {\mathrm{37}}^1\times {\mathrm{443}}^1$

素因数の和:501

約数の個数: 72

約数和(自身を含む): 51729552

約数和(自身を除く): 30749072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 256, 296, 320, 370, 443, 592, 640, 740, 886, 1184, 1280, 1480, 1772, 2215, 2368, 2960, 3544, 4430, 4736, 5920, 7088, 8860, 9472, 11840, 14176, 16391, 17720, 23680, 28352, 32782, 35440, 47360, 56704, 65564, 70880, 81955, 113408, 131128, 141760, 163910, 262256, 283520, 327820, 524512, 567040, 655640, 1049024, 1311280, 2098048, 2622560, 4196096, 5245120, 10490240, 20980480]

約数ペア:

[(1, 20980480), (2, 10490240), (4, 5245120), (5, 4196096), (8, 2622560), (10, 2098048), (16, 1311280), (20, 1049024), (32, 655640), (37, 567040), (40, 524512), (64, 327820), (74, 283520), (80, 262256), (128, 163910), (148, 141760), (160, 131128), (185, 113408), (256, 81955), (296, 70880), (320, 65564), (370, 56704), (443, 47360), (592, 35440), (640, 32782), (740, 28352), (886, 23680), (1184, 17720), (1280, 16391), (1480, 14176), (1772, 11840), (2215, 9472), (2368, 8860), (2960, 7088), (3544, 5920), (4430, 4736)]