81720406

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{20879}}^1$

素因数の和:21003

約数の個数: 16

約数和(自身を含む): 130291200

約数和(自身を除く): 48570794

約数列:

[1, 2, 19, 38, 103, 206, 1957, 3914, 20879, 41758, 396701, 793402, 2150537, 4301074, 40860203, 81720406]

約数ペア:

[(1, 81720406), (2, 40860203), (19, 4301074), (38, 2150537), (103, 793402), (206, 396701), (1957, 41758), (3914, 20879)]