21754467

素因数分解:

$3^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:173

約数の個数: 64

約数和(自身を含む): 39321600

約数和(自身を除く): 17567133

約数列:

[1, 3, 7, 9, 21, 27, 31, 47, 63, 79, 93, 141, 189, 217, 237, 279, 329, 423, 553, 651, 711, 837, 987, 1269, 1457, 1659, 1953, 2133, 2449, 2961, 3713, 4371, 4977, 5859, 7347, 8883, 10199, 11139, 13113, 14931, 17143, 22041, 25991, 30597, 33417, 39339, 51429, 66123, 77973, 91791, 100251, 115103, 154287, 233919, 275373, 345309, 462861, 701757, 805721, 1035927, 2417163, 3107781, 7251489, 21754467]

約数ペア:

[(1, 21754467), (3, 7251489), (7, 3107781), (9, 2417163), (21, 1035927), (27, 805721), (31, 701757), (47, 462861), (63, 345309), (79, 275373), (93, 233919), (141, 154287), (189, 115103), (217, 100251), (237, 91791), (279, 77973), (329, 66123), (423, 51429), (553, 39339), (651, 33417), (711, 30597), (837, 25991), (987, 22041), (1269, 17143), (1457, 14931), (1659, 13113), (1953, 11139), (2133, 10199), (2449, 8883), (2961, 7347), (3713, 5859), (4371, 4977)]