78178820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{64081}}^1$

素因数の和:64151

約数の個数: 24

約数和(自身を含む): 166869528

約数和(自身を除く): 88690708

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 64081, 128162, 256324, 320405, 640810, 1281620, 3908941, 7817882, 15635764, 19544705, 39089410, 78178820]

約数ペア:

[(1, 78178820), (2, 39089410), (4, 19544705), (5, 15635764), (10, 7817882), (20, 3908941), (61, 1281620), (122, 640810), (244, 320405), (305, 256324), (610, 128162), (1220, 64081)]