199379980

素因数分解:

$2^2\times 5^1\times {\mathrm{823}}^1\times {\mathrm{12113}}^1$

素因数の和:12945

約数の個数: 24

約数和(自身を含む): 419241312

約数和(自身を除く): 219861332

約数列:

[1, 2, 4, 5, 10, 20, 823, 1646, 3292, 4115, 8230, 12113, 16460, 24226, 48452, 60565, 121130, 242260, 9968999, 19937998, 39875996, 49844995, 99689990, 199379980]

約数ペア:

[(1, 199379980), (2, 99689990), (4, 49844995), (5, 39875996), (10, 19937998), (20, 9968999), (823, 242260), (1646, 121130), (3292, 60565), (4115, 48452), (8230, 24226), (12113, 16460)]