205655320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{395491}}^1$

素因数の和:395515

約数の個数: 32

約数和(自身を含む): 498319920

約数和(自身を除く): 292664600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 395491, 790982, 1581964, 1977455, 3163928, 3954910, 5141383, 7909820, 10282766, 15819640, 20565532, 25706915, 41131064, 51413830, 102827660, 205655320]

約数ペア:

[(1, 205655320), (2, 102827660), (4, 51413830), (5, 41131064), (8, 25706915), (10, 20565532), (13, 15819640), (20, 10282766), (26, 7909820), (40, 5141383), (52, 3954910), (65, 3163928), (104, 1977455), (130, 1581964), (260, 790982), (520, 395491)]