21621808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103951}}^1$

素因数の和:103972

約数の個数: 20

約数和(自身を含む): 45115168

約数和(自身を除く): 23493360

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103951, 207902, 415804, 831608, 1351363, 1663216, 2702726, 5405452, 10810904, 21621808]

約数ペア:

[(1, 21621808), (2, 10810904), (4, 5405452), (8, 2702726), (13, 1663216), (16, 1351363), (26, 831608), (52, 415804), (104, 207902), (208, 103951)]