21387303

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{233}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 37380096

約数和(自身を除く): 15992793

約数列:

[1, 3, 7, 9, 21, 31, 47, 63, 93, 141, 217, 233, 279, 329, 423, 651, 699, 987, 1457, 1631, 1953, 2097, 2961, 4371, 4893, 7223, 10199, 10951, 13113, 14679, 21669, 30597, 32853, 50561, 65007, 76657, 91791, 98559, 151683, 229971, 339481, 455049, 689913, 1018443, 2376367, 3055329, 7129101, 21387303]

約数ペア:

[(1, 21387303), (3, 7129101), (7, 3055329), (9, 2376367), (21, 1018443), (31, 689913), (47, 455049), (63, 339481), (93, 229971), (141, 151683), (217, 98559), (233, 91791), (279, 76657), (329, 65007), (423, 50561), (651, 32853), (699, 30597), (987, 21669), (1457, 14679), (1631, 13113), (1953, 10951), (2097, 10199), (2961, 7223), (4371, 4893)]