821240

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{419}}^1$

素因数の和:444

約数の個数: 48

約数和(自身を含む): 2154600

約数和(自身を除く): 1333360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 419, 490, 838, 980, 1676, 1960, 2095, 2933, 3352, 4190, 5866, 8380, 11732, 14665, 16760, 20531, 23464, 29330, 41062, 58660, 82124, 102655, 117320, 164248, 205310, 410620, 821240]

約数ペア:

[(1, 821240), (2, 410620), (4, 205310), (5, 164248), (7, 117320), (8, 102655), (10, 82124), (14, 58660), (20, 41062), (28, 29330), (35, 23464), (40, 20531), (49, 16760), (56, 14665), (70, 11732), (98, 8380), (140, 5866), (196, 4190), (245, 3352), (280, 2933), (392, 2095), (419, 1960), (490, 1676), (838, 980)]