21784420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22229}}^1$

素因数の和:22252

約数の個数: 36

約数和(自身を含む): 53218620

約数和(自身を除く): 31434200

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22229, 44458, 88916, 111145, 155603, 222290, 311206, 444580, 622412, 778015, 1089221, 1556030, 2178442, 3112060, 4356884, 5446105, 10892210, 21784420]

約数ペア:

[(1, 21784420), (2, 10892210), (4, 5446105), (5, 4356884), (7, 3112060), (10, 2178442), (14, 1556030), (20, 1089221), (28, 778015), (35, 622412), (49, 444580), (70, 311206), (98, 222290), (140, 155603), (196, 111145), (245, 88916), (490, 44458), (980, 22229)]