20655720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{317}}^1$

素因数の和:515

約数の個数: 96

約数和(自身を含む): 67714920

約数和(自身を除く): 47059200

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 181, 317, 360, 362, 543, 634, 724, 905, 951, 1086, 1268, 1448, 1585, 1629, 1810, 1902, 2172, 2536, 2715, 2853, 3170, 3258, 3620, 3804, 4344, 4755, 5430, 5706, 6340, 6516, 7240, 7608, 8145, 9510, 10860, 11412, 12680, 13032, 14265, 16290, 19020, 21720, 22824, 28530, 32580, 38040, 57060, 57377, 65160, 114120, 114754, 172131, 229508, 286885, 344262, 459016, 516393, 573770, 688524, 860655, 1032786, 1147540, 1377048, 1721310, 2065572, 2295080, 2581965, 3442620, 4131144, 5163930, 6885240, 10327860, 20655720]

約数ペア:

[(1, 20655720), (2, 10327860), (3, 6885240), (4, 5163930), (5, 4131144), (6, 3442620), (8, 2581965), (9, 2295080), (10, 2065572), (12, 1721310), (15, 1377048), (18, 1147540), (20, 1032786), (24, 860655), (30, 688524), (36, 573770), (40, 516393), (45, 459016), (60, 344262), (72, 286885), (90, 229508), (120, 172131), (180, 114754), (181, 114120), (317, 65160), (360, 57377), (362, 57060), (543, 38040), (634, 32580), (724, 28530), (905, 22824), (951, 21720), (1086, 19020), (1268, 16290), (1448, 14265), (1585, 13032), (1629, 12680), (1810, 11412), (1902, 10860), (2172, 9510), (2536, 8145), (2715, 7608), (2853, 7240), (3170, 6516), (3258, 6340), (3620, 5706), (3804, 5430), (4344, 4755)]