21409880

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{10099}}^1$

素因数の和:10163

約数の個数: 32

約数和(自身を含む): 49086000

約数和(自身を除く): 27676120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 10099, 20198, 40396, 50495, 80792, 100990, 201980, 403960, 535247, 1070494, 2140988, 2676235, 4281976, 5352470, 10704940, 21409880]

約数ペア:

[(1, 21409880), (2, 10704940), (4, 5352470), (5, 4281976), (8, 2676235), (10, 2140988), (20, 1070494), (40, 535247), (53, 403960), (106, 201980), (212, 100990), (265, 80792), (424, 50495), (530, 40396), (1060, 20198), (2120, 10099)]