21988351

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1$

素因数の和:319

約数の個数: 32

約数和(自身を含む): 29145600

約数和(自身を除く): 7157249

約数列:

[1, 7, 11, 29, 43, 77, 203, 229, 301, 319, 473, 1247, 1603, 2233, 2519, 3311, 6641, 8729, 9847, 13717, 17633, 46487, 68929, 73051, 96019, 108317, 285563, 511357, 758219, 1998941, 3141193, 21988351]

約数ペア:

[(1, 21988351), (7, 3141193), (11, 1998941), (29, 758219), (43, 511357), (77, 285563), (203, 108317), (229, 96019), (301, 73051), (319, 68929), (473, 46487), (1247, 17633), (1603, 13717), (2233, 9847), (2519, 8729), (3311, 6641)]