2001990025

素因数分解:

$5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{279023}}^1$

素因数の和:279081

約数の個数: 24

約数和(自身を含む): 2906313984

約数和(自身を除く): 904323959

約数列:

[1, 5, 7, 25, 35, 41, 175, 205, 287, 1025, 1435, 7175, 279023, 1395115, 1953161, 6975575, 9765805, 11439943, 48829025, 57199715, 80079601, 285998575, 400398005, 2001990025]

約数ペア:

[(1, 2001990025), (5, 400398005), (7, 285998575), (25, 80079601), (35, 57199715), (41, 48829025), (175, 11439943), (205, 9765805), (287, 6975575), (1025, 1953161), (1435, 1395115), (7175, 279023)]