21992178

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:223

約数の個数: 64

約数和(自身を含む): 49674240

約数和(自身を除く): 27682062

約数列:

[1, 2, 3, 6, 13, 26, 39, 43, 78, 79, 83, 86, 129, 158, 166, 237, 249, 258, 474, 498, 559, 1027, 1079, 1118, 1677, 2054, 2158, 3081, 3237, 3354, 3397, 3569, 6162, 6474, 6557, 6794, 7138, 10191, 10707, 13114, 19671, 20382, 21414, 39342, 44161, 46397, 85241, 88322, 92794, 132483, 139191, 170482, 255723, 264966, 278382, 281951, 511446, 563902, 845853, 1691706, 3665363, 7330726, 10996089, 21992178]

約数ペア:

[(1, 21992178), (2, 10996089), (3, 7330726), (6, 3665363), (13, 1691706), (26, 845853), (39, 563902), (43, 511446), (78, 281951), (79, 278382), (83, 264966), (86, 255723), (129, 170482), (158, 139191), (166, 132483), (237, 92794), (249, 88322), (258, 85241), (474, 46397), (498, 44161), (559, 39342), (1027, 21414), (1079, 20382), (1118, 19671), (1677, 13114), (2054, 10707), (2158, 10191), (3081, 7138), (3237, 6794), (3354, 6557), (3397, 6474), (3569, 6162)]