20659840

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1699}}^1$

素因数の和:1737

約数の個数: 64

約数和(自身を含む): 52020000

約数和(自身を除く): 31360160

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 304, 320, 380, 608, 640, 760, 1216, 1520, 1699, 2432, 3040, 3398, 6080, 6796, 8495, 12160, 13592, 16990, 27184, 32281, 33980, 54368, 64562, 67960, 108736, 129124, 135920, 161405, 217472, 258248, 271840, 322810, 516496, 543680, 645620, 1032992, 1087360, 1291240, 2065984, 2582480, 4131968, 5164960, 10329920, 20659840]

約数ペア:

[(1, 20659840), (2, 10329920), (4, 5164960), (5, 4131968), (8, 2582480), (10, 2065984), (16, 1291240), (19, 1087360), (20, 1032992), (32, 645620), (38, 543680), (40, 516496), (64, 322810), (76, 271840), (80, 258248), (95, 217472), (128, 161405), (152, 135920), (160, 129124), (190, 108736), (304, 67960), (320, 64562), (380, 54368), (608, 33980), (640, 32281), (760, 27184), (1216, 16990), (1520, 13592), (1699, 12160), (2432, 8495), (3040, 6796), (3398, 6080)]