20701863

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 39338208

約数和(自身を除く): 18636345

約数列:

[1, 3, 7, 9, 13, 21, 23, 39, 49, 63, 69, 91, 117, 147, 157, 161, 207, 273, 299, 441, 471, 483, 637, 819, 897, 1099, 1127, 1413, 1449, 1911, 2041, 2093, 2691, 3297, 3381, 3611, 5733, 6123, 6279, 7693, 9891, 10143, 10833, 14287, 14651, 18369, 18837, 23079, 25277, 32499, 42861, 43953, 46943, 69237, 75831, 100009, 128583, 131859, 140829, 176939, 227493, 300027, 328601, 422487, 530817, 900081, 985803, 1592451, 2300207, 2957409, 6900621, 20701863]

約数ペア:

[(1, 20701863), (3, 6900621), (7, 2957409), (9, 2300207), (13, 1592451), (21, 985803), (23, 900081), (39, 530817), (49, 422487), (63, 328601), (69, 300027), (91, 227493), (117, 176939), (147, 140829), (157, 131859), (161, 128583), (207, 100009), (273, 75831), (299, 69237), (441, 46943), (471, 43953), (483, 42861), (637, 32499), (819, 25277), (897, 23079), (1099, 18837), (1127, 18369), (1413, 14651), (1449, 14287), (1911, 10833), (2041, 10143), (2093, 9891), (2691, 7693), (3297, 6279), (3381, 6123), (3611, 5733)]