79993720

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{4073}}^1$

素因数の和:4575

約数の個数: 32

約数和(自身を含む): 180396720

約数和(自身を除く): 100403000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2455, 3928, 4073, 4910, 8146, 9820, 16292, 19640, 20365, 32584, 40730, 81460, 162920, 1999843, 3999686, 7999372, 9999215, 15998744, 19998430, 39996860, 79993720]

約数ペア:

[(1, 79993720), (2, 39996860), (4, 19998430), (5, 15998744), (8, 9999215), (10, 7999372), (20, 3999686), (40, 1999843), (491, 162920), (982, 81460), (1964, 40730), (2455, 32584), (3928, 20365), (4073, 19640), (4910, 16292), (8146, 9820)]