90827980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{479}}^1\times {\mathrm{499}}^1$

素因数の和:1006

約数の個数: 48

約数和(自身を含む): 201600000

約数和(自身を除く): 110772020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 479, 499, 958, 998, 1916, 1996, 2395, 2495, 4790, 4990, 9101, 9481, 9580, 9980, 18202, 18962, 36404, 37924, 45505, 47405, 91010, 94810, 182020, 189620, 239021, 478042, 956084, 1195105, 2390210, 4541399, 4780420, 9082798, 18165596, 22706995, 45413990, 90827980]

約数ペア:

[(1, 90827980), (2, 45413990), (4, 22706995), (5, 18165596), (10, 9082798), (19, 4780420), (20, 4541399), (38, 2390210), (76, 1195105), (95, 956084), (190, 478042), (380, 239021), (479, 189620), (499, 182020), (958, 94810), (998, 91010), (1916, 47405), (1996, 45505), (2395, 37924), (2495, 36404), (4790, 18962), (4990, 18202), (9101, 9980), (9481, 9580)]