21478212

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2939}}^1$

素因数の和:2985

約数の個数: 72

約数和(自身を含む): 64209600

約数和(自身を除く): 42731388

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 29, 36, 42, 58, 63, 84, 87, 116, 126, 174, 203, 252, 261, 348, 406, 522, 609, 812, 1044, 1218, 1827, 2436, 2939, 3654, 5878, 7308, 8817, 11756, 17634, 20573, 26451, 35268, 41146, 52902, 61719, 82292, 85231, 105804, 123438, 170462, 185157, 246876, 255693, 340924, 370314, 511386, 596617, 740628, 767079, 1022772, 1193234, 1534158, 1789851, 2386468, 3068316, 3579702, 5369553, 7159404, 10739106, 21478212]

約数ペア:

[(1, 21478212), (2, 10739106), (3, 7159404), (4, 5369553), (6, 3579702), (7, 3068316), (9, 2386468), (12, 1789851), (14, 1534158), (18, 1193234), (21, 1022772), (28, 767079), (29, 740628), (36, 596617), (42, 511386), (58, 370314), (63, 340924), (84, 255693), (87, 246876), (116, 185157), (126, 170462), (174, 123438), (203, 105804), (252, 85231), (261, 82292), (348, 61719), (406, 52902), (522, 41146), (609, 35268), (812, 26451), (1044, 20573), (1218, 17634), (1827, 11756), (2436, 8817), (2939, 7308), (3654, 5878)]