81438965

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1\times {\mathrm{1949}}^1$

素因数の和:2152

約数の個数: 16

約数和(自身を含む): 100105200

約数和(自身を除く): 18666235

約数列:

[1, 5, 61, 137, 305, 685, 1949, 8357, 9745, 41785, 118889, 267013, 594445, 1335065, 16287793, 81438965]

約数ペア:

[(1, 81438965), (5, 16287793), (61, 1335065), (137, 594445), (305, 267013), (685, 118889), (1949, 41785), (8357, 9745)]