21642920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41621}}^1$

素因数の和:41645

約数の個数: 32

約数和(自身を含む): 52443720

約数和(自身を除く): 30800800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41621, 83242, 166484, 208105, 332968, 416210, 541073, 832420, 1082146, 1664840, 2164292, 2705365, 4328584, 5410730, 10821460, 21642920]

約数ペア:

[(1, 21642920), (2, 10821460), (4, 5410730), (5, 4328584), (8, 2705365), (10, 2164292), (13, 1664840), (20, 1082146), (26, 832420), (40, 541073), (52, 416210), (65, 332968), (104, 208105), (130, 166484), (260, 83242), (520, 41621)]