215687420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{4211}}^1$

素因数の和:4430

約数の個数: 48

約数和(自身を含む): 490377888

約数和(自身を除く): 274690468

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 197, 260, 394, 788, 985, 1970, 2561, 3940, 4211, 5122, 8422, 10244, 12805, 16844, 21055, 25610, 42110, 51220, 54743, 84220, 109486, 218972, 273715, 547430, 829567, 1094860, 1659134, 3318268, 4147835, 8295670, 10784371, 16591340, 21568742, 43137484, 53921855, 107843710, 215687420]

約数ペア:

[(1, 215687420), (2, 107843710), (4, 53921855), (5, 43137484), (10, 21568742), (13, 16591340), (20, 10784371), (26, 8295670), (52, 4147835), (65, 3318268), (130, 1659134), (197, 1094860), (260, 829567), (394, 547430), (788, 273715), (985, 218972), (1970, 109486), (2561, 84220), (3940, 54743), (4211, 51220), (5122, 42110), (8422, 25610), (10244, 21055), (12805, 16844)]