21177016

素因数分解:

$2^3\times 7^2\times {\mathrm{89}}^1\times {\mathrm{607}}^1$

素因数の和:716

約数の個数: 48

約数和(自身を含む): 46785600

約数和(自身を除く): 25608584

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 89, 98, 178, 196, 356, 392, 607, 623, 712, 1214, 1246, 2428, 2492, 4249, 4361, 4856, 4984, 8498, 8722, 16996, 17444, 29743, 33992, 34888, 54023, 59486, 108046, 118972, 216092, 237944, 378161, 432184, 756322, 1512644, 2647127, 3025288, 5294254, 10588508, 21177016]

約数ペア:

[(1, 21177016), (2, 10588508), (4, 5294254), (7, 3025288), (8, 2647127), (14, 1512644), (28, 756322), (49, 432184), (56, 378161), (89, 237944), (98, 216092), (178, 118972), (196, 108046), (356, 59486), (392, 54023), (607, 34888), (623, 33992), (712, 29743), (1214, 17444), (1246, 16996), (2428, 8722), (2492, 8498), (4249, 4984), (4361, 4856)]