21493017

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{163}}^1$

素因数の和:219

約数の個数: 72

約数和(自身を含む): 40832064

約数和(自身を除く): 19339047

約数列:

[1, 3, 7, 9, 13, 21, 23, 39, 49, 63, 69, 91, 117, 147, 161, 163, 207, 273, 299, 441, 483, 489, 637, 819, 897, 1127, 1141, 1449, 1467, 1911, 2093, 2119, 2691, 3381, 3423, 3749, 5733, 6279, 6357, 7987, 10143, 10269, 11247, 14651, 14833, 18837, 19071, 23961, 26243, 33741, 43953, 44499, 48737, 71883, 78729, 103831, 131859, 133497, 146211, 183701, 236187, 311493, 341159, 438633, 551103, 934479, 1023477, 1653309, 2388113, 3070431, 7164339, 21493017]

約数ペア:

[(1, 21493017), (3, 7164339), (7, 3070431), (9, 2388113), (13, 1653309), (21, 1023477), (23, 934479), (39, 551103), (49, 438633), (63, 341159), (69, 311493), (91, 236187), (117, 183701), (147, 146211), (161, 133497), (163, 131859), (207, 103831), (273, 78729), (299, 71883), (441, 48737), (483, 44499), (489, 43953), (637, 33741), (819, 26243), (897, 23961), (1127, 19071), (1141, 18837), (1449, 14833), (1467, 14651), (1911, 11247), (2093, 10269), (2119, 10143), (2691, 7987), (3381, 6357), (3423, 6279), (3749, 5733)]