21538648

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{263}}^1\times {\mathrm{353}}^1$

素因数の和:651

約数の個数: 32

約数和(自身を含む): 42055200

約数和(自身を除く): 20516552

約数列:

[1, 2, 4, 8, 29, 58, 116, 232, 263, 353, 526, 706, 1052, 1412, 2104, 2824, 7627, 10237, 15254, 20474, 30508, 40948, 61016, 81896, 92839, 185678, 371356, 742712, 2692331, 5384662, 10769324, 21538648]

約数ペア:

[(1, 21538648), (2, 10769324), (4, 5384662), (8, 2692331), (29, 742712), (58, 371356), (116, 185678), (232, 92839), (263, 81896), (353, 61016), (526, 40948), (706, 30508), (1052, 20474), (1412, 15254), (2104, 10237), (2824, 7627)]