21787380

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{4483}}^1$

素因数の和:4507

約数の個数: 72

約数和(自身を含む): 68551392

約数和(自身を除く): 46764012

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 486, 540, 810, 972, 1215, 1620, 2430, 4483, 4860, 8966, 13449, 17932, 22415, 26898, 40347, 44830, 53796, 67245, 80694, 89660, 121041, 134490, 161388, 201735, 242082, 268980, 363123, 403470, 484164, 605205, 726246, 806940, 1089369, 1210410, 1452492, 1815615, 2178738, 2420820, 3631230, 4357476, 5446845, 7262460, 10893690, 21787380]

約数ペア:

[(1, 21787380), (2, 10893690), (3, 7262460), (4, 5446845), (5, 4357476), (6, 3631230), (9, 2420820), (10, 2178738), (12, 1815615), (15, 1452492), (18, 1210410), (20, 1089369), (27, 806940), (30, 726246), (36, 605205), (45, 484164), (54, 403470), (60, 363123), (81, 268980), (90, 242082), (108, 201735), (135, 161388), (162, 134490), (180, 121041), (243, 89660), (270, 80694), (324, 67245), (405, 53796), (486, 44830), (540, 40347), (810, 26898), (972, 22415), (1215, 17932), (1620, 13449), (2430, 8966), (4483, 4860)]