20210925

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{281}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 38604672

約数和(自身を除く): 18393747

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 137, 175, 281, 411, 525, 685, 843, 959, 1405, 1967, 2055, 2877, 3425, 4215, 4795, 5901, 7025, 9835, 10275, 14385, 21075, 23975, 29505, 38497, 49175, 71925, 115491, 147525, 192485, 269479, 577455, 808437, 962425, 1347395, 2887275, 4042185, 6736975, 20210925]

約数ペア:

[(1, 20210925), (3, 6736975), (5, 4042185), (7, 2887275), (15, 1347395), (21, 962425), (25, 808437), (35, 577455), (75, 269479), (105, 192485), (137, 147525), (175, 115491), (281, 71925), (411, 49175), (525, 38497), (685, 29505), (843, 23975), (959, 21075), (1405, 14385), (1967, 10275), (2055, 9835), (2877, 7025), (3425, 5901), (4215, 4795)]