21909188

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{587}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 46362624

約数和(自身を除く): 24453436

約数列:

[1, 2, 4, 7, 14, 28, 31, 43, 62, 86, 124, 172, 217, 301, 434, 587, 602, 868, 1174, 1204, 1333, 2348, 2666, 4109, 5332, 8218, 9331, 16436, 18197, 18662, 25241, 36394, 37324, 50482, 72788, 100964, 127379, 176687, 254758, 353374, 509516, 706748, 782471, 1564942, 3129884, 5477297, 10954594, 21909188]

約数ペア:

[(1, 21909188), (2, 10954594), (4, 5477297), (7, 3129884), (14, 1564942), (28, 782471), (31, 706748), (43, 509516), (62, 353374), (86, 254758), (124, 176687), (172, 127379), (217, 100964), (301, 72788), (434, 50482), (587, 37324), (602, 36394), (868, 25241), (1174, 18662), (1204, 18197), (1333, 16436), (2348, 9331), (2666, 8218), (4109, 5332)]