21680540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22123}}^1$

素因数の和:22146

約数の個数: 36

約数和(自身を含む): 52964856

約数和(自身を除く): 31284316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22123, 44246, 88492, 110615, 154861, 221230, 309722, 442460, 619444, 774305, 1084027, 1548610, 2168054, 3097220, 4336108, 5420135, 10840270, 21680540]

約数ペア:

[(1, 21680540), (2, 10840270), (4, 5420135), (5, 4336108), (7, 3097220), (10, 2168054), (14, 1548610), (20, 1084027), (28, 774305), (35, 619444), (49, 442460), (70, 309722), (98, 221230), (140, 154861), (196, 110615), (245, 88492), (490, 44246), (980, 22123)]