19959680

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2399}}^1$

素因数の和:2431

約数の個数: 64

約数和(自身を含む): 51408000

約数和(自身を除く): 31448320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2399, 4160, 4798, 8320, 9596, 11995, 19192, 23990, 31187, 38384, 47980, 62374, 76768, 95960, 124748, 153536, 155935, 191920, 249496, 307072, 311870, 383840, 498992, 623740, 767680, 997984, 1247480, 1535360, 1995968, 2494960, 3991936, 4989920, 9979840, 19959680]

約数ペア:

[(1, 19959680), (2, 9979840), (4, 4989920), (5, 3991936), (8, 2494960), (10, 1995968), (13, 1535360), (16, 1247480), (20, 997984), (26, 767680), (32, 623740), (40, 498992), (52, 383840), (64, 311870), (65, 307072), (80, 249496), (104, 191920), (128, 155935), (130, 153536), (160, 124748), (208, 95960), (260, 76768), (320, 62374), (416, 47980), (520, 38384), (640, 31187), (832, 23990), (1040, 19192), (1664, 11995), (2080, 9596), (2399, 8320), (4160, 4798)]