20987850

素因数分解:

$2^1\times 3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{229}}^1$

素因数の和:304

約数の個数: 96

約数和(自身を含む): 57496320

約数和(自身を除く): 36508470

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 25, 26, 30, 39, 47, 50, 65, 75, 78, 94, 130, 141, 150, 195, 229, 235, 282, 325, 390, 458, 470, 611, 650, 687, 705, 975, 1145, 1175, 1222, 1374, 1410, 1833, 1950, 2290, 2350, 2977, 3055, 3435, 3525, 3666, 5725, 5954, 6110, 6870, 7050, 8931, 9165, 10763, 11450, 14885, 15275, 17175, 17862, 18330, 21526, 29770, 30550, 32289, 34350, 44655, 45825, 53815, 64578, 74425, 89310, 91650, 107630, 139919, 148850, 161445, 223275, 269075, 279838, 322890, 419757, 446550, 538150, 699595, 807225, 839514, 1399190, 1614450, 2098785, 3497975, 4197570, 6995950, 10493925, 20987850]

約数ペア:

[(1, 20987850), (2, 10493925), (3, 6995950), (5, 4197570), (6, 3497975), (10, 2098785), (13, 1614450), (15, 1399190), (25, 839514), (26, 807225), (30, 699595), (39, 538150), (47, 446550), (50, 419757), (65, 322890), (75, 279838), (78, 269075), (94, 223275), (130, 161445), (141, 148850), (150, 139919), (195, 107630), (229, 91650), (235, 89310), (282, 74425), (325, 64578), (390, 53815), (458, 45825), (470, 44655), (611, 34350), (650, 32289), (687, 30550), (705, 29770), (975, 21526), (1145, 18330), (1175, 17862), (1222, 17175), (1374, 15275), (1410, 14885), (1833, 11450), (1950, 10763), (2290, 9165), (2350, 8931), (2977, 7050), (3055, 6870), (3435, 6110), (3525, 5954), (3666, 5725)]