21437940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{431}}^1\times {\mathrm{829}}^1$

素因数の和:1272

約数の個数: 48

約数和(自身を含む): 60238080

約数和(自身を除く): 38800140

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 431, 829, 862, 1293, 1658, 1724, 2155, 2487, 2586, 3316, 4145, 4310, 4974, 5172, 6465, 8290, 8620, 9948, 12435, 12930, 16580, 24870, 25860, 49740, 357299, 714598, 1071897, 1429196, 1786495, 2143794, 3572990, 4287588, 5359485, 7145980, 10718970, 21437940]

約数ペア:

[(1, 21437940), (2, 10718970), (3, 7145980), (4, 5359485), (5, 4287588), (6, 3572990), (10, 2143794), (12, 1786495), (15, 1429196), (20, 1071897), (30, 714598), (60, 357299), (431, 49740), (829, 25860), (862, 24870), (1293, 16580), (1658, 12930), (1724, 12435), (2155, 9948), (2487, 8620), (2586, 8290), (3316, 6465), (4145, 5172), (4310, 4974)]