18863747

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1\times {\mathrm{421}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 22322112

約数和(自身を除く): 3458365

約数列:

[1, 7, 37, 173, 259, 421, 1211, 2947, 6401, 15577, 44807, 72833, 109039, 509831, 2694821, 18863747]

約数ペア:

[(1, 18863747), (7, 2694821), (37, 509831), (173, 109039), (259, 72833), (421, 44807), (1211, 15577), (2947, 6401)]