18715216

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{89977}}^1$

素因数の和:89998

約数の個数: 20

約数和(自身を含む): 39050452

約数和(自身を除く): 20335236

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 89977, 179954, 359908, 719816, 1169701, 1439632, 2339402, 4678804, 9357608, 18715216]

約数ペア:

[(1, 18715216), (2, 9357608), (4, 4678804), (8, 2339402), (13, 1439632), (16, 1169701), (26, 719816), (52, 359908), (104, 179954), (208, 89977)]