21441250

素因数分解:

$2^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{1009}}^1$

素因数の和:1048

約数の個数: 40

約数和(自身を含む): 42595740

約数和(自身を除く): 21154490

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 85, 125, 170, 250, 425, 625, 850, 1009, 1250, 2018, 2125, 4250, 5045, 10090, 10625, 17153, 21250, 25225, 34306, 50450, 85765, 126125, 171530, 252250, 428825, 630625, 857650, 1261250, 2144125, 4288250, 10720625, 21441250]

約数ペア:

[(1, 21441250), (2, 10720625), (5, 4288250), (10, 2144125), (17, 1261250), (25, 857650), (34, 630625), (50, 428825), (85, 252250), (125, 171530), (170, 126125), (250, 85765), (425, 50450), (625, 34306), (850, 25225), (1009, 21250), (1250, 17153), (2018, 10625), (2125, 10090), (4250, 5045)]