20959600

素因数分解:

$2^4\times 5^2\times {\mathrm{61}}^1\times {\mathrm{859}}^1$

素因数の和:938

約数の個数: 60

約数和(自身を含む): 51240520

約数和(自身を除く): 30280920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 61, 80, 100, 122, 200, 244, 305, 400, 488, 610, 859, 976, 1220, 1525, 1718, 2440, 3050, 3436, 4295, 4880, 6100, 6872, 8590, 12200, 13744, 17180, 21475, 24400, 34360, 42950, 52399, 68720, 85900, 104798, 171800, 209596, 261995, 343600, 419192, 523990, 838384, 1047980, 1309975, 2095960, 2619950, 4191920, 5239900, 10479800, 20959600]

約数ペア:

[(1, 20959600), (2, 10479800), (4, 5239900), (5, 4191920), (8, 2619950), (10, 2095960), (16, 1309975), (20, 1047980), (25, 838384), (40, 523990), (50, 419192), (61, 343600), (80, 261995), (100, 209596), (122, 171800), (200, 104798), (244, 85900), (305, 68720), (400, 52399), (488, 42950), (610, 34360), (859, 24400), (976, 21475), (1220, 17180), (1525, 13744), (1718, 12200), (2440, 8590), (3050, 6872), (3436, 6100), (4295, 4880)]