1787128220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{66239}}^1$

素因数の和:66338

約数の個数: 48

約数和(自身を含む): 4006195200

約数和(自身を除く): 2219066980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 142, 190, 284, 355, 380, 710, 1349, 1420, 2698, 5396, 6745, 13490, 26980, 66239, 132478, 264956, 331195, 662390, 1258541, 1324780, 2517082, 4702969, 5034164, 6292705, 9405938, 12585410, 18811876, 23514845, 25170820, 47029690, 89356411, 94059380, 178712822, 357425644, 446782055, 893564110, 1787128220]

約数ペア:

[(1, 1787128220), (2, 893564110), (4, 446782055), (5, 357425644), (10, 178712822), (19, 94059380), (20, 89356411), (38, 47029690), (71, 25170820), (76, 23514845), (95, 18811876), (142, 12585410), (190, 9405938), (284, 6292705), (355, 5034164), (380, 4702969), (710, 2517082), (1349, 1324780), (1420, 1258541), (2698, 662390), (5396, 331195), (6745, 264956), (13490, 132478), (26980, 66239)]