161154920

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{10357}}^1$

素因数の和:10757

約数の個数: 32

約数和(自身を含む): 363565800

約数和(自身を除く): 202410880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 3112, 3890, 7780, 10357, 15560, 20714, 41428, 51785, 82856, 103570, 207140, 414280, 4028873, 8057746, 16115492, 20144365, 32230984, 40288730, 80577460, 161154920]

約数ペア:

[(1, 161154920), (2, 80577460), (4, 40288730), (5, 32230984), (8, 20144365), (10, 16115492), (20, 8057746), (40, 4028873), (389, 414280), (778, 207140), (1556, 103570), (1945, 82856), (3112, 51785), (3890, 41428), (7780, 20714), (10357, 15560)]