71280520

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{4357}}^1$

素因数の和:4777

約数の個数: 32

約数和(自身を含む): 160810200

約数和(自身を除く): 89529680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 4090, 4357, 8180, 8714, 16360, 17428, 21785, 34856, 43570, 87140, 174280, 1782013, 3564026, 7128052, 8910065, 14256104, 17820130, 35640260, 71280520]

約数ペア:

[(1, 71280520), (2, 35640260), (4, 17820130), (5, 14256104), (8, 8910065), (10, 7128052), (20, 3564026), (40, 1782013), (409, 174280), (818, 87140), (1636, 43570), (2045, 34856), (3272, 21785), (4090, 17428), (4357, 16360), (8180, 8714)]