20902660

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{821}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 46952640

約数和(自身を除く): 26049980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 67, 76, 95, 134, 190, 268, 335, 380, 670, 821, 1273, 1340, 1642, 2546, 3284, 4105, 5092, 6365, 8210, 12730, 15599, 16420, 25460, 31198, 55007, 62396, 77995, 110014, 155990, 220028, 275035, 311980, 550070, 1045133, 1100140, 2090266, 4180532, 5225665, 10451330, 20902660]

約数ペア:

[(1, 20902660), (2, 10451330), (4, 5225665), (5, 4180532), (10, 2090266), (19, 1100140), (20, 1045133), (38, 550070), (67, 311980), (76, 275035), (95, 220028), (134, 155990), (190, 110014), (268, 77995), (335, 62396), (380, 55007), (670, 31198), (821, 25460), (1273, 16420), (1340, 15599), (1642, 12730), (2546, 8210), (3284, 6365), (4105, 5092)]