21178640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{641}}^1$

素因数の和:720

約数の個数: 80

約数和(自身を含む): 57317760

約数和(自身を除く): 36139120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 59, 70, 80, 112, 118, 140, 236, 280, 295, 413, 472, 560, 590, 641, 826, 944, 1180, 1282, 1652, 2065, 2360, 2564, 3205, 3304, 4130, 4487, 4720, 5128, 6410, 6608, 8260, 8974, 10256, 12820, 16520, 17948, 22435, 25640, 33040, 35896, 37819, 44870, 51280, 71792, 75638, 89740, 151276, 179480, 189095, 264733, 302552, 358960, 378190, 529466, 605104, 756380, 1058932, 1323665, 1512760, 2117864, 2647330, 3025520, 4235728, 5294660, 10589320, 21178640]

約数ペア:

[(1, 21178640), (2, 10589320), (4, 5294660), (5, 4235728), (7, 3025520), (8, 2647330), (10, 2117864), (14, 1512760), (16, 1323665), (20, 1058932), (28, 756380), (35, 605104), (40, 529466), (56, 378190), (59, 358960), (70, 302552), (80, 264733), (112, 189095), (118, 179480), (140, 151276), (236, 89740), (280, 75638), (295, 71792), (413, 51280), (472, 44870), (560, 37819), (590, 35896), (641, 33040), (826, 25640), (944, 22435), (1180, 17948), (1282, 16520), (1652, 12820), (2065, 10256), (2360, 8974), (2564, 8260), (3205, 6608), (3304, 6410), (4130, 5128), (4487, 4720)]