90887980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{271}}^1\times {\mathrm{409}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 196721280

約数和(自身を除く): 105833300

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 271, 409, 410, 542, 818, 820, 1084, 1355, 1636, 2045, 2710, 4090, 5420, 8180, 11111, 16769, 22222, 33538, 44444, 55555, 67076, 83845, 110839, 111110, 167690, 221678, 222220, 335380, 443356, 554195, 1108390, 2216780, 4544399, 9088798, 18177596, 22721995, 45443990, 90887980]

約数ペア:

[(1, 90887980), (2, 45443990), (4, 22721995), (5, 18177596), (10, 9088798), (20, 4544399), (41, 2216780), (82, 1108390), (164, 554195), (205, 443356), (271, 335380), (409, 222220), (410, 221678), (542, 167690), (818, 111110), (820, 110839), (1084, 83845), (1355, 67076), (1636, 55555), (2045, 44444), (2710, 33538), (4090, 22222), (5420, 16769), (8180, 11111)]