394760

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 907200

約数和(自身を除く): 512440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 139, 142, 278, 284, 355, 556, 568, 695, 710, 1112, 1390, 1420, 2780, 2840, 5560, 9869, 19738, 39476, 49345, 78952, 98690, 197380, 394760]

約数ペア:

[(1, 394760), (2, 197380), (4, 98690), (5, 78952), (8, 49345), (10, 39476), (20, 19738), (40, 9869), (71, 5560), (139, 2840), (142, 2780), (278, 1420), (284, 1390), (355, 1112), (556, 710), (568, 695)]