20407912

素因数分解:

$2^3\times 7^2\times {\mathrm{79}}^1\times {\mathrm{659}}^1$

素因数の和:758

約数の個数: 48

約数和(自身を含む): 45144000

約数和(自身を除く): 24736088

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 79, 98, 158, 196, 316, 392, 553, 632, 659, 1106, 1318, 2212, 2636, 3871, 4424, 4613, 5272, 7742, 9226, 15484, 18452, 30968, 32291, 36904, 52061, 64582, 104122, 129164, 208244, 258328, 364427, 416488, 728854, 1457708, 2550989, 2915416, 5101978, 10203956, 20407912]

約数ペア:

[(1, 20407912), (2, 10203956), (4, 5101978), (7, 2915416), (8, 2550989), (14, 1457708), (28, 728854), (49, 416488), (56, 364427), (79, 258328), (98, 208244), (158, 129164), (196, 104122), (316, 64582), (392, 52061), (553, 36904), (632, 32291), (659, 30968), (1106, 18452), (1318, 15484), (2212, 9226), (2636, 7742), (3871, 5272), (4424, 4613)]