21289660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3709}}^1$

素因数の和:3766

約数の個数: 48

約数和(自身を含む): 52355520

約数和(自身を除く): 31065860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3709, 5740, 7418, 14836, 18545, 25963, 37090, 51926, 74180, 103852, 129815, 152069, 259630, 304138, 519260, 608276, 760345, 1064483, 1520690, 2128966, 3041380, 4257932, 5322415, 10644830, 21289660]

約数ペア:

[(1, 21289660), (2, 10644830), (4, 5322415), (5, 4257932), (7, 3041380), (10, 2128966), (14, 1520690), (20, 1064483), (28, 760345), (35, 608276), (41, 519260), (70, 304138), (82, 259630), (140, 152069), (164, 129815), (205, 103852), (287, 74180), (410, 51926), (574, 37090), (820, 25963), (1148, 18545), (1435, 14836), (2870, 7418), (3709, 5740)]