19812560

素因数分解:

$2^4\times 5^1\times {\mathrm{227}}^1\times {\mathrm{1091}}^1$

素因数の和:1331

約数の個数: 40

約数和(自身を含む): 46309536

約数和(自身を除く): 26496976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 227, 454, 908, 1091, 1135, 1816, 2182, 2270, 3632, 4364, 4540, 5455, 8728, 9080, 10910, 17456, 18160, 21820, 43640, 87280, 247657, 495314, 990628, 1238285, 1981256, 2476570, 3962512, 4953140, 9906280, 19812560]

約数ペア:

[(1, 19812560), (2, 9906280), (4, 4953140), (5, 3962512), (8, 2476570), (10, 1981256), (16, 1238285), (20, 990628), (40, 495314), (80, 247657), (227, 87280), (454, 43640), (908, 21820), (1091, 18160), (1135, 17456), (1816, 10910), (2182, 9080), (2270, 8728), (3632, 5455), (4364, 4540)]