644540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:126

約数の個数: 48

約数和(自身を含む): 1519392

約数和(自身を除く): 874852

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 67, 74, 130, 134, 148, 185, 260, 268, 335, 370, 481, 670, 740, 871, 962, 1340, 1742, 1924, 2405, 2479, 3484, 4355, 4810, 4958, 8710, 9620, 9916, 12395, 17420, 24790, 32227, 49580, 64454, 128908, 161135, 322270, 644540]

約数ペア:

[(1, 644540), (2, 322270), (4, 161135), (5, 128908), (10, 64454), (13, 49580), (20, 32227), (26, 24790), (37, 17420), (52, 12395), (65, 9916), (67, 9620), (74, 8710), (130, 4958), (134, 4810), (148, 4355), (185, 3484), (260, 2479), (268, 2405), (335, 1924), (370, 1742), (481, 1340), (670, 962), (740, 871)]