21180872

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{163}}^1\times {\mathrm{439}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 41131200

約数和(自身を除く): 19950328

約数列:

[1, 2, 4, 8, 37, 74, 148, 163, 296, 326, 439, 652, 878, 1304, 1756, 3512, 6031, 12062, 16243, 24124, 32486, 48248, 64972, 71557, 129944, 143114, 286228, 572456, 2647609, 5295218, 10590436, 21180872]

約数ペア:

[(1, 21180872), (2, 10590436), (4, 5295218), (8, 2647609), (37, 572456), (74, 286228), (148, 143114), (163, 129944), (296, 71557), (326, 64972), (439, 48248), (652, 32486), (878, 24124), (1304, 16243), (1756, 12062), (3512, 6031)]