21965391

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:233

約数の個数: 64

約数和(自身を含む): 40304640

約数和(自身を除く): 18339249

約数列:

[1, 3, 7, 9, 21, 23, 27, 31, 63, 69, 93, 161, 163, 189, 207, 217, 279, 483, 489, 621, 651, 713, 837, 1141, 1449, 1467, 1953, 2139, 3423, 3749, 4347, 4401, 4991, 5053, 5859, 6417, 10269, 11247, 14973, 15159, 19251, 26243, 30807, 33741, 35371, 44919, 45477, 78729, 101223, 106113, 116219, 134757, 136431, 236187, 318339, 348657, 708561, 813533, 955017, 1045971, 2440599, 3137913, 7321797, 21965391]

約数ペア:

[(1, 21965391), (3, 7321797), (7, 3137913), (9, 2440599), (21, 1045971), (23, 955017), (27, 813533), (31, 708561), (63, 348657), (69, 318339), (93, 236187), (161, 136431), (163, 134757), (189, 116219), (207, 106113), (217, 101223), (279, 78729), (483, 45477), (489, 44919), (621, 35371), (651, 33741), (713, 30807), (837, 26243), (1141, 19251), (1449, 15159), (1467, 14973), (1953, 11247), (2139, 10269), (3423, 6417), (3749, 5859), (4347, 5053), (4401, 4991)]