21127620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{431}}^1$

素因数の和:505

約数の個数: 96

約数和(自身を含む): 63866880

約数和(自身を除く): 42739260

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 43, 57, 60, 76, 86, 95, 114, 129, 172, 190, 215, 228, 258, 285, 380, 430, 431, 516, 570, 645, 817, 860, 862, 1140, 1290, 1293, 1634, 1724, 2155, 2451, 2580, 2586, 3268, 4085, 4310, 4902, 5172, 6465, 8170, 8189, 8620, 9804, 12255, 12930, 16340, 16378, 18533, 24510, 24567, 25860, 32756, 37066, 40945, 49020, 49134, 55599, 74132, 81890, 92665, 98268, 111198, 122835, 163780, 185330, 222396, 245670, 277995, 352127, 370660, 491340, 555990, 704254, 1056381, 1111980, 1408508, 1760635, 2112762, 3521270, 4225524, 5281905, 7042540, 10563810, 21127620]

約数ペア:

[(1, 21127620), (2, 10563810), (3, 7042540), (4, 5281905), (5, 4225524), (6, 3521270), (10, 2112762), (12, 1760635), (15, 1408508), (19, 1111980), (20, 1056381), (30, 704254), (38, 555990), (43, 491340), (57, 370660), (60, 352127), (76, 277995), (86, 245670), (95, 222396), (114, 185330), (129, 163780), (172, 122835), (190, 111198), (215, 98268), (228, 92665), (258, 81890), (285, 74132), (380, 55599), (430, 49134), (431, 49020), (516, 40945), (570, 37066), (645, 32756), (817, 25860), (860, 24567), (862, 24510), (1140, 18533), (1290, 16378), (1293, 16340), (1634, 12930), (1724, 12255), (2155, 9804), (2451, 8620), (2580, 8189), (2586, 8170), (3268, 6465), (4085, 5172), (4310, 4902)]