81718880

素因数分解:

$2^5\times 5^1\times {\mathrm{239}}^1\times {\mathrm{2137}}^1$

素因数の和:2391

約数の個数: 48

約数和(自身を含む): 193959360

約数和(自身を除く): 112240480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 239, 478, 956, 1195, 1912, 2137, 2390, 3824, 4274, 4780, 7648, 8548, 9560, 10685, 17096, 19120, 21370, 34192, 38240, 42740, 68384, 85480, 170960, 341920, 510743, 1021486, 2042972, 2553715, 4085944, 5107430, 8171888, 10214860, 16343776, 20429720, 40859440, 81718880]

約数ペア:

[(1, 81718880), (2, 40859440), (4, 20429720), (5, 16343776), (8, 10214860), (10, 8171888), (16, 5107430), (20, 4085944), (32, 2553715), (40, 2042972), (80, 1021486), (160, 510743), (239, 341920), (478, 170960), (956, 85480), (1195, 68384), (1912, 42740), (2137, 38240), (2390, 34192), (3824, 21370), (4274, 19120), (4780, 17096), (7648, 10685), (8548, 9560)]