21368960

素因数分解:

$2^7\times 5^1\times {\mathrm{173}}^1\times {\mathrm{193}}^1$

素因数の和:385

約数の個数: 64

約数和(自身を含む): 51646680

約数和(自身を除く): 30277720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 173, 193, 320, 346, 386, 640, 692, 772, 865, 965, 1384, 1544, 1730, 1930, 2768, 3088, 3460, 3860, 5536, 6176, 6920, 7720, 11072, 12352, 13840, 15440, 22144, 24704, 27680, 30880, 33389, 55360, 61760, 66778, 110720, 123520, 133556, 166945, 267112, 333890, 534224, 667780, 1068448, 1335560, 2136896, 2671120, 4273792, 5342240, 10684480, 21368960]

約数ペア:

[(1, 21368960), (2, 10684480), (4, 5342240), (5, 4273792), (8, 2671120), (10, 2136896), (16, 1335560), (20, 1068448), (32, 667780), (40, 534224), (64, 333890), (80, 267112), (128, 166945), (160, 133556), (173, 123520), (193, 110720), (320, 66778), (346, 61760), (386, 55360), (640, 33389), (692, 30880), (772, 27680), (865, 24704), (965, 22144), (1384, 15440), (1544, 13840), (1730, 12352), (1930, 11072), (2768, 7720), (3088, 6920), (3460, 6176), (3860, 5536)]