21370940

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1667}}^1$

素因数の和:2317

約数の個数: 24

約数和(自身を含む): 44975952

約数和(自身を除く): 23605012

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 1667, 2564, 3205, 3334, 6410, 6668, 8335, 12820, 16670, 33340, 1068547, 2137094, 4274188, 5342735, 10685470, 21370940]

約数ペア:

[(1, 21370940), (2, 10685470), (4, 5342735), (5, 4274188), (10, 2137094), (20, 1068547), (641, 33340), (1282, 16670), (1667, 12820), (2564, 8335), (3205, 6668), (3334, 6410)]