21856940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22303}}^1$

素因数の和:22326

約数の個数: 36

約数和(自身を含む): 53395776

約数和(自身を除く): 31538836

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22303, 44606, 89212, 111515, 156121, 223030, 312242, 446060, 624484, 780605, 1092847, 1561210, 2185694, 3122420, 4371388, 5464235, 10928470, 21856940]

約数ペア:

[(1, 21856940), (2, 10928470), (4, 5464235), (5, 4371388), (7, 3122420), (10, 2185694), (14, 1561210), (20, 1092847), (28, 780605), (35, 624484), (49, 446060), (70, 312242), (98, 223030), (140, 156121), (196, 111515), (245, 89212), (490, 44606), (980, 22303)]