21979120

素因数分解:

$2^4\times 5^1\times {\mathrm{274739}}^1$

素因数の和:274752

約数の個数: 20

約数和(自身を含む): 51101640

約数和(自身を除く): 29122520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274739, 549478, 1098956, 1373695, 2197912, 2747390, 4395824, 5494780, 10989560, 21979120]

約数ペア:

[(1, 21979120), (2, 10989560), (4, 5494780), (5, 4395824), (8, 2747390), (10, 2197912), (16, 1373695), (20, 1098956), (40, 549478), (80, 274739)]