21665840

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5527}}^1$

素因数の和:5554

約数の個数: 60

約数和(自身を含む): 58607856

約数和(自身を除く): 36942016

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5527, 11054, 22108, 27635, 38689, 44216, 55270, 77378, 88432, 110540, 154756, 193445, 221080, 270823, 309512, 386890, 442160, 541646, 619024, 773780, 1083292, 1354115, 1547560, 2166584, 2708230, 3095120, 4333168, 5416460, 10832920, 21665840]

約数ペア:

[(1, 21665840), (2, 10832920), (4, 5416460), (5, 4333168), (7, 3095120), (8, 2708230), (10, 2166584), (14, 1547560), (16, 1354115), (20, 1083292), (28, 773780), (35, 619024), (40, 541646), (49, 442160), (56, 386890), (70, 309512), (80, 270823), (98, 221080), (112, 193445), (140, 154756), (196, 110540), (245, 88432), (280, 77378), (392, 55270), (490, 44216), (560, 38689), (784, 27635), (980, 22108), (1960, 11054), (3920, 5527)]