21055420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{827}}^1$

素因数の和:922

約数の個数: 48

約数和(自身を含む): 47295360

約数和(自身を除く): 26239940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 67, 76, 95, 134, 190, 268, 335, 380, 670, 827, 1273, 1340, 1654, 2546, 3308, 4135, 5092, 6365, 8270, 12730, 15713, 16540, 25460, 31426, 55409, 62852, 78565, 110818, 157130, 221636, 277045, 314260, 554090, 1052771, 1108180, 2105542, 4211084, 5263855, 10527710, 21055420]

約数ペア:

[(1, 21055420), (2, 10527710), (4, 5263855), (5, 4211084), (10, 2105542), (19, 1108180), (20, 1052771), (38, 554090), (67, 314260), (76, 277045), (95, 221636), (134, 157130), (190, 110818), (268, 78565), (335, 62852), (380, 55409), (670, 31426), (827, 25460), (1273, 16540), (1340, 15713), (1654, 12730), (2546, 8270), (3308, 6365), (4135, 5092)]