278575758

素因数分解:

$2^1\times 3^2\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{997}}^1$

素因数の和:1086

約数の個数: 72

約数和(自身を含む): 652488408

約数和(自身を除く): 373912650

約数列:

[1, 2, 3, 6, 9, 18, 19, 38, 43, 57, 86, 114, 129, 171, 258, 342, 361, 387, 722, 774, 817, 997, 1083, 1634, 1994, 2166, 2451, 2991, 3249, 4902, 5982, 6498, 7353, 8973, 14706, 15523, 17946, 18943, 31046, 37886, 42871, 46569, 56829, 85742, 93138, 113658, 128613, 139707, 170487, 257226, 279414, 340974, 359917, 385839, 719834, 771678, 814549, 1079751, 1629098, 2159502, 2443647, 3239253, 4887294, 6478506, 7330941, 14661882, 15476431, 30952862, 46429293, 92858586, 139287879, 278575758]

約数ペア:

[(1, 278575758), (2, 139287879), (3, 92858586), (6, 46429293), (9, 30952862), (18, 15476431), (19, 14661882), (38, 7330941), (43, 6478506), (57, 4887294), (86, 3239253), (114, 2443647), (129, 2159502), (171, 1629098), (258, 1079751), (342, 814549), (361, 771678), (387, 719834), (722, 385839), (774, 359917), (817, 340974), (997, 279414), (1083, 257226), (1634, 170487), (1994, 139707), (2166, 128613), (2451, 113658), (2991, 93138), (3249, 85742), (4902, 56829), (5982, 46569), (6498, 42871), (7353, 37886), (8973, 31046), (14706, 18943), (15523, 17946)]