81621904

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{919}}^1$

素因数の和:1008

約数の個数: 80

約数和(自身を含む): 198042880

約数和(自身を除く): 116420976

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 61, 91, 104, 112, 122, 182, 208, 244, 364, 427, 488, 728, 793, 854, 919, 976, 1456, 1586, 1708, 1838, 3172, 3416, 3676, 5551, 6344, 6433, 6832, 7352, 11102, 11947, 12688, 12866, 14704, 22204, 23894, 25732, 44408, 47788, 51464, 56059, 83629, 88816, 95576, 102928, 112118, 167258, 191152, 224236, 334516, 392413, 448472, 669032, 728767, 784826, 896944, 1338064, 1457534, 1569652, 2915068, 3139304, 5101369, 5830136, 6278608, 10202738, 11660272, 20405476, 40810952, 81621904]

約数ペア:

[(1, 81621904), (2, 40810952), (4, 20405476), (7, 11660272), (8, 10202738), (13, 6278608), (14, 5830136), (16, 5101369), (26, 3139304), (28, 2915068), (52, 1569652), (56, 1457534), (61, 1338064), (91, 896944), (104, 784826), (112, 728767), (122, 669032), (182, 448472), (208, 392413), (244, 334516), (364, 224236), (427, 191152), (488, 167258), (728, 112118), (793, 102928), (854, 95576), (919, 88816), (976, 83629), (1456, 56059), (1586, 51464), (1708, 47788), (1838, 44408), (3172, 25732), (3416, 23894), (3676, 22204), (5551, 14704), (6344, 12866), (6433, 12688), (6832, 11947), (7352, 11102)]