81989960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{5437}}^1$

素因数の和:5490

約数の個数: 64

約数和(自身を含む): 205556400

約数和(自身を除く): 123566440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 29, 40, 52, 58, 65, 104, 116, 130, 145, 232, 260, 290, 377, 520, 580, 754, 1160, 1508, 1885, 3016, 3770, 5437, 7540, 10874, 15080, 21748, 27185, 43496, 54370, 70681, 108740, 141362, 157673, 217480, 282724, 315346, 353405, 565448, 630692, 706810, 788365, 1261384, 1413620, 1576730, 2049749, 2827240, 3153460, 4099498, 6306920, 8198996, 10248745, 16397992, 20497490, 40994980, 81989960]

約数ペア:

[(1, 81989960), (2, 40994980), (4, 20497490), (5, 16397992), (8, 10248745), (10, 8198996), (13, 6306920), (20, 4099498), (26, 3153460), (29, 2827240), (40, 2049749), (52, 1576730), (58, 1413620), (65, 1261384), (104, 788365), (116, 706810), (130, 630692), (145, 565448), (232, 353405), (260, 315346), (290, 282724), (377, 217480), (520, 157673), (580, 141362), (754, 108740), (1160, 70681), (1508, 54370), (1885, 43496), (3016, 27185), (3770, 21748), (5437, 15080), (7540, 10874)]