21619760

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{5099}}^1$

素因数の和:5165

約数の個数: 40

約数和(自身を含む): 51224400

約数和(自身を除く): 29604640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 5099, 10198, 20396, 25495, 40792, 50990, 81584, 101980, 203960, 270247, 407920, 540494, 1080988, 1351235, 2161976, 2702470, 4323952, 5404940, 10809880, 21619760]

約数ペア:

[(1, 21619760), (2, 10809880), (4, 5404940), (5, 4323952), (8, 2702470), (10, 2161976), (16, 1351235), (20, 1080988), (40, 540494), (53, 407920), (80, 270247), (106, 203960), (212, 101980), (265, 81584), (424, 50990), (530, 40792), (848, 25495), (1060, 20396), (2120, 10198), (4240, 5099)]