20909440

素因数分解:

$2^7\times 5^1\times {\mathrm{37}}^1\times {\mathrm{883}}^1$

素因数の和:939

約数の個数: 64

約数和(自身を含む): 51395760

約数和(自身を除く): 30486320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 296, 320, 370, 592, 640, 740, 883, 1184, 1480, 1766, 2368, 2960, 3532, 4415, 4736, 5920, 7064, 8830, 11840, 14128, 17660, 23680, 28256, 32671, 35320, 56512, 65342, 70640, 113024, 130684, 141280, 163355, 261368, 282560, 326710, 522736, 565120, 653420, 1045472, 1306840, 2090944, 2613680, 4181888, 5227360, 10454720, 20909440]

約数ペア:

[(1, 20909440), (2, 10454720), (4, 5227360), (5, 4181888), (8, 2613680), (10, 2090944), (16, 1306840), (20, 1045472), (32, 653420), (37, 565120), (40, 522736), (64, 326710), (74, 282560), (80, 261368), (128, 163355), (148, 141280), (160, 130684), (185, 113024), (296, 70640), (320, 65342), (370, 56512), (592, 35320), (640, 32671), (740, 28256), (883, 23680), (1184, 17660), (1480, 14128), (1766, 11840), (2368, 8830), (2960, 7064), (3532, 5920), (4415, 4736)]