19938560

素因数分解:

$2^8\times 5^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:479

約数の個数: 72

約数和(自身を含む): 49166376

約数和(自身を除く): 29227816

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, 421, 592, 640, 740, 842, 1184, 1280, 1480, 1684, 2105, 2368, 2960, 3368, 4210, 4736, 5920, 6736, 8420, 9472, 11840, 13472, 15577, 16840, 23680, 26944, 31154, 33680, 47360, 53888, 62308, 67360, 77885, 107776, 124616, 134720, 155770, 249232, 269440, 311540, 498464, 538880, 623080, 996928, 1246160, 1993856, 2492320, 3987712, 4984640, 9969280, 19938560]

約数ペア:

[(1, 19938560), (2, 9969280), (4, 4984640), (5, 3987712), (8, 2492320), (10, 1993856), (16, 1246160), (20, 996928), (32, 623080), (37, 538880), (40, 498464), (64, 311540), (74, 269440), (80, 249232), (128, 155770), (148, 134720), (160, 124616), (185, 107776), (256, 77885), (296, 67360), (320, 62308), (370, 53888), (421, 47360), (592, 33680), (640, 31154), (740, 26944), (842, 23680), (1184, 16840), (1280, 15577), (1480, 13472), (1684, 11840), (2105, 9472), (2368, 8420), (2960, 6736), (3368, 5920), (4210, 4736)]