1287100

素因数分解:

$2^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:286

約数の個数: 36

約数和(自身を含む): 2852248

約数和(自身を除く): 1565148

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 211, 244, 305, 422, 610, 844, 1055, 1220, 1525, 2110, 3050, 4220, 5275, 6100, 10550, 12871, 21100, 25742, 51484, 64355, 128710, 257420, 321775, 643550, 1287100]

約数ペア:

[(1, 1287100), (2, 643550), (4, 321775), (5, 257420), (10, 128710), (20, 64355), (25, 51484), (50, 25742), (61, 21100), (100, 12871), (122, 10550), (211, 6100), (244, 5275), (305, 4220), (422, 3050), (610, 2110), (844, 1525), (1055, 1220)]