64213720

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{21991}}^1$

素因数の和:22075

約数の個数: 32

約数和(自身を含む): 146466720

約数和(自身を除く): 82253000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 21991, 43982, 87964, 109955, 175928, 219910, 439820, 879640, 1605343, 3210686, 6421372, 8026715, 12842744, 16053430, 32106860, 64213720]

約数ペア:

[(1, 64213720), (2, 32106860), (4, 16053430), (5, 12842744), (8, 8026715), (10, 6421372), (20, 3210686), (40, 1605343), (73, 879640), (146, 439820), (292, 219910), (365, 175928), (584, 109955), (730, 87964), (1460, 43982), (2920, 21991)]