21377020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:179

約数の個数: 96

約数和(自身を含む): 54286848

約数和(自身を除く): 32909828

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 53, 67, 70, 86, 106, 134, 140, 172, 212, 215, 265, 268, 301, 335, 371, 430, 469, 530, 602, 670, 742, 860, 938, 1060, 1204, 1340, 1484, 1505, 1855, 1876, 2279, 2345, 2881, 3010, 3551, 3710, 4558, 4690, 5762, 6020, 7102, 7420, 9116, 9380, 11395, 11524, 14204, 14405, 15953, 17755, 20167, 22790, 24857, 28810, 31906, 35510, 40334, 45580, 49714, 57620, 63812, 71020, 79765, 80668, 99428, 100835, 124285, 152693, 159530, 201670, 248570, 305386, 319060, 403340, 497140, 610772, 763465, 1068851, 1526930, 2137702, 3053860, 4275404, 5344255, 10688510, 21377020]

約数ペア:

[(1, 21377020), (2, 10688510), (4, 5344255), (5, 4275404), (7, 3053860), (10, 2137702), (14, 1526930), (20, 1068851), (28, 763465), (35, 610772), (43, 497140), (53, 403340), (67, 319060), (70, 305386), (86, 248570), (106, 201670), (134, 159530), (140, 152693), (172, 124285), (212, 100835), (215, 99428), (265, 80668), (268, 79765), (301, 71020), (335, 63812), (371, 57620), (430, 49714), (469, 45580), (530, 40334), (602, 35510), (670, 31906), (742, 28810), (860, 24857), (938, 22790), (1060, 20167), (1204, 17755), (1340, 15953), (1484, 14405), (1505, 14204), (1855, 11524), (1876, 11395), (2279, 9380), (2345, 9116), (2881, 7420), (3010, 7102), (3551, 6020), (3710, 5762), (4558, 4690)]