18020320

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^2\times {\mathrm{67}}^1$

素因数の和:164

約数の個数: 72

約数和(自身を含む): 44287992

約数和(自身を除く): 26267672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 67, 80, 82, 134, 160, 164, 205, 268, 328, 335, 410, 536, 656, 670, 820, 1072, 1312, 1340, 1640, 1681, 2144, 2680, 2747, 3280, 3362, 5360, 5494, 6560, 6724, 8405, 10720, 10988, 13448, 13735, 16810, 21976, 26896, 27470, 33620, 43952, 53792, 54940, 67240, 87904, 109880, 112627, 134480, 219760, 225254, 268960, 439520, 450508, 563135, 901016, 1126270, 1802032, 2252540, 3604064, 4505080, 9010160, 18020320]

約数ペア:

[(1, 18020320), (2, 9010160), (4, 4505080), (5, 3604064), (8, 2252540), (10, 1802032), (16, 1126270), (20, 901016), (32, 563135), (40, 450508), (41, 439520), (67, 268960), (80, 225254), (82, 219760), (134, 134480), (160, 112627), (164, 109880), (205, 87904), (268, 67240), (328, 54940), (335, 53792), (410, 43952), (536, 33620), (656, 27470), (670, 26896), (820, 21976), (1072, 16810), (1312, 13735), (1340, 13448), (1640, 10988), (1681, 10720), (2144, 8405), (2680, 6724), (2747, 6560), (3280, 5494), (3362, 5360)]