1990805530

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{2293}}^1$

素因数の和:2543

約数の個数: 64

約数和(自身を含む): 4175447040

約数和(自身を除く): 2184641510

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 79, 157, 158, 314, 395, 553, 785, 790, 1099, 1106, 1570, 2198, 2293, 2765, 4586, 5495, 5530, 10990, 11465, 12403, 16051, 22930, 24806, 32102, 62015, 80255, 86821, 124030, 160510, 173642, 181147, 360001, 362294, 434105, 720002, 868210, 905735, 1268029, 1800005, 1811470, 2520007, 2536058, 3600010, 5040014, 6340145, 12600035, 12680290, 25200070, 28440079, 56880158, 142200395, 199080553, 284400790, 398161106, 995402765, 1990805530]

約数ペア:

[(1, 1990805530), (2, 995402765), (5, 398161106), (7, 284400790), (10, 199080553), (14, 142200395), (35, 56880158), (70, 28440079), (79, 25200070), (157, 12680290), (158, 12600035), (314, 6340145), (395, 5040014), (553, 3600010), (785, 2536058), (790, 2520007), (1099, 1811470), (1106, 1800005), (1570, 1268029), (2198, 905735), (2293, 868210), (2765, 720002), (4586, 434105), (5495, 362294), (5530, 360001), (10990, 181147), (11465, 173642), (12403, 160510), (16051, 124030), (22930, 86821), (24806, 80255), (32102, 62015)]