21452720

素因数分解:

$2^4\times 5^1\times {\mathrm{229}}^1\times {\mathrm{1171}}^1$

素因数の和:1413

約数の個数: 40

約数和(自身を含む): 50138160

約数和(自身を除く): 28685440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 229, 458, 916, 1145, 1171, 1832, 2290, 2342, 3664, 4580, 4684, 5855, 9160, 9368, 11710, 18320, 18736, 23420, 46840, 93680, 268159, 536318, 1072636, 1340795, 2145272, 2681590, 4290544, 5363180, 10726360, 21452720]

約数ペア:

[(1, 21452720), (2, 10726360), (4, 5363180), (5, 4290544), (8, 2681590), (10, 2145272), (16, 1340795), (20, 1072636), (40, 536318), (80, 268159), (229, 93680), (458, 46840), (916, 23420), (1145, 18736), (1171, 18320), (1832, 11710), (2290, 9368), (2342, 9160), (3664, 5855), (4580, 4684)]