21241808

素因数分解:

$2^4\times 7^1\times {\mathrm{89}}^1\times {\mathrm{2131}}^1$

素因数の和:2235

約数の個数: 40

約数和(自身を含む): 47586240

約数和(自身を除く): 26344432

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 89, 112, 178, 356, 623, 712, 1246, 1424, 2131, 2492, 4262, 4984, 8524, 9968, 14917, 17048, 29834, 34096, 59668, 119336, 189659, 238672, 379318, 758636, 1327613, 1517272, 2655226, 3034544, 5310452, 10620904, 21241808]

約数ペア:

[(1, 21241808), (2, 10620904), (4, 5310452), (7, 3034544), (8, 2655226), (14, 1517272), (16, 1327613), (28, 758636), (56, 379318), (89, 238672), (112, 189659), (178, 119336), (356, 59668), (623, 34096), (712, 29834), (1246, 17048), (1424, 14917), (2131, 9968), (2492, 8524), (4262, 4984)]