81008020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{7351}}^1$

素因数の和:7408

約数の個数: 48

約数和(自身を含む): 185270400

約数和(自身を除く): 104262380

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 95, 116, 145, 190, 290, 380, 551, 580, 1102, 2204, 2755, 5510, 7351, 11020, 14702, 29404, 36755, 73510, 139669, 147020, 213179, 279338, 426358, 558676, 698345, 852716, 1065895, 1396690, 2131790, 2793380, 4050401, 4263580, 8100802, 16201604, 20252005, 40504010, 81008020]

約数ペア:

[(1, 81008020), (2, 40504010), (4, 20252005), (5, 16201604), (10, 8100802), (19, 4263580), (20, 4050401), (29, 2793380), (38, 2131790), (58, 1396690), (76, 1065895), (95, 852716), (116, 698345), (145, 558676), (190, 426358), (290, 279338), (380, 213179), (551, 147020), (580, 139669), (1102, 73510), (2204, 36755), (2755, 29404), (5510, 14702), (7351, 11020)]