540020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:120

約数の個数: 48

約数和(自身を含む): 1279488

約数和(自身を除く): 739468

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 67, 124, 130, 134, 155, 260, 268, 310, 335, 403, 620, 670, 806, 871, 1340, 1612, 1742, 2015, 2077, 3484, 4030, 4154, 4355, 8060, 8308, 8710, 10385, 17420, 20770, 27001, 41540, 54002, 108004, 135005, 270010, 540020]

約数ペア:

[(1, 540020), (2, 270010), (4, 135005), (5, 108004), (10, 54002), (13, 41540), (20, 27001), (26, 20770), (31, 17420), (52, 10385), (62, 8710), (65, 8308), (67, 8060), (124, 4355), (130, 4154), (134, 4030), (155, 3484), (260, 2077), (268, 2015), (310, 1742), (335, 1612), (403, 1340), (620, 871), (670, 806)]