20865840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{227}}^1\times {\mathrm{383}}^1$

素因数の和:626

約数の個数: 80

約数和(自身を含む): 65138688

約数和(自身を除く): 44272848

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 227, 240, 383, 454, 681, 766, 908, 1135, 1149, 1362, 1532, 1816, 1915, 2270, 2298, 2724, 3064, 3405, 3632, 3830, 4540, 4596, 5448, 5745, 6128, 6810, 7660, 9080, 9192, 10896, 11490, 13620, 15320, 18160, 18384, 22980, 27240, 30640, 45960, 54480, 86941, 91920, 173882, 260823, 347764, 434705, 521646, 695528, 869410, 1043292, 1304115, 1391056, 1738820, 2086584, 2608230, 3477640, 4173168, 5216460, 6955280, 10432920, 20865840]

約数ペア:

[(1, 20865840), (2, 10432920), (3, 6955280), (4, 5216460), (5, 4173168), (6, 3477640), (8, 2608230), (10, 2086584), (12, 1738820), (15, 1391056), (16, 1304115), (20, 1043292), (24, 869410), (30, 695528), (40, 521646), (48, 434705), (60, 347764), (80, 260823), (120, 173882), (227, 91920), (240, 86941), (383, 54480), (454, 45960), (681, 30640), (766, 27240), (908, 22980), (1135, 18384), (1149, 18160), (1362, 15320), (1532, 13620), (1816, 11490), (1915, 10896), (2270, 9192), (2298, 9080), (2724, 7660), (3064, 6810), (3405, 6128), (3632, 5745), (3830, 5448), (4540, 4596)]