21012540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{5227}}^1$

素因数の和:5306

約数の個数: 48

約数和(自身を含む): 59724672

約数和(自身を除く): 38712132

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 67, 134, 201, 268, 335, 402, 670, 804, 1005, 1340, 2010, 4020, 5227, 10454, 15681, 20908, 26135, 31362, 52270, 62724, 78405, 104540, 156810, 313620, 350209, 700418, 1050627, 1400836, 1751045, 2101254, 3502090, 4202508, 5253135, 7004180, 10506270, 21012540]

約数ペア:

[(1, 21012540), (2, 10506270), (3, 7004180), (4, 5253135), (5, 4202508), (6, 3502090), (10, 2101254), (12, 1751045), (15, 1400836), (20, 1050627), (30, 700418), (60, 350209), (67, 313620), (134, 156810), (201, 104540), (268, 78405), (335, 62724), (402, 52270), (670, 31362), (804, 26135), (1005, 20908), (1340, 15681), (2010, 10454), (4020, 5227)]