19640680

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:674

約数の個数: 64

約数和(自身を含む): 47678400

約数和(自身を除く): 28037720

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 86, 95, 152, 172, 190, 215, 344, 380, 430, 601, 760, 817, 860, 1202, 1634, 1720, 2404, 3005, 3268, 4085, 4808, 6010, 6536, 8170, 11419, 12020, 16340, 22838, 24040, 25843, 32680, 45676, 51686, 57095, 91352, 103372, 114190, 129215, 206744, 228380, 258430, 456760, 491017, 516860, 982034, 1033720, 1964068, 2455085, 3928136, 4910170, 9820340, 19640680]

約数ペア:

[(1, 19640680), (2, 9820340), (4, 4910170), (5, 3928136), (8, 2455085), (10, 1964068), (19, 1033720), (20, 982034), (38, 516860), (40, 491017), (43, 456760), (76, 258430), (86, 228380), (95, 206744), (152, 129215), (172, 114190), (190, 103372), (215, 91352), (344, 57095), (380, 51686), (430, 45676), (601, 32680), (760, 25843), (817, 24040), (860, 22838), (1202, 16340), (1634, 12020), (1720, 11419), (2404, 8170), (3005, 6536), (3268, 6010), (4085, 4808)]