78231980

素因数分解:

$2^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1\times {\mathrm{263}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 167650560

約数和(自身を除く): 89418580

約数列:

[1, 2, 4, 5, 10, 20, 107, 139, 214, 263, 278, 428, 526, 535, 556, 695, 1052, 1070, 1315, 1390, 2140, 2630, 2780, 5260, 14873, 28141, 29746, 36557, 56282, 59492, 73114, 74365, 112564, 140705, 146228, 148730, 182785, 281410, 297460, 365570, 562820, 731140, 3911599, 7823198, 15646396, 19557995, 39115990, 78231980]

約数ペア:

[(1, 78231980), (2, 39115990), (4, 19557995), (5, 15646396), (10, 7823198), (20, 3911599), (107, 731140), (139, 562820), (214, 365570), (263, 297460), (278, 281410), (428, 182785), (526, 148730), (535, 146228), (556, 140705), (695, 112564), (1052, 74365), (1070, 73114), (1315, 59492), (1390, 56282), (2140, 36557), (2630, 29746), (2780, 28141), (5260, 14873)]