19829720

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6791}}^1$

素因数の和:6875

約数の個数: 32

約数和(自身を含む): 45234720

約数和(自身を除く): 25405000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 6791, 13582, 27164, 33955, 54328, 67910, 135820, 271640, 495743, 991486, 1982972, 2478715, 3965944, 4957430, 9914860, 19829720]

約数ペア:

[(1, 19829720), (2, 9914860), (4, 4957430), (5, 3965944), (8, 2478715), (10, 1982972), (20, 991486), (40, 495743), (73, 271640), (146, 135820), (292, 67910), (365, 54328), (584, 33955), (730, 27164), (1460, 13582), (2920, 6791)]