20041245

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:235

約数の個数: 72

約数和(自身を含む): 41347800

約数和(自身を除く): 21306555

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 61, 63, 105, 147, 149, 183, 245, 305, 315, 427, 441, 447, 549, 735, 745, 915, 1043, 1281, 1341, 2135, 2205, 2235, 2745, 2989, 3129, 3843, 5215, 6405, 6705, 7301, 8967, 9089, 9387, 14945, 15645, 19215, 21903, 26901, 27267, 36505, 44835, 45445, 46935, 63623, 65709, 81801, 109515, 134505, 136335, 190869, 318115, 328545, 409005, 445361, 572607, 954345, 1336083, 2226805, 2863035, 4008249, 6680415, 20041245]

約数ペア:

[(1, 20041245), (3, 6680415), (5, 4008249), (7, 2863035), (9, 2226805), (15, 1336083), (21, 954345), (35, 572607), (45, 445361), (49, 409005), (61, 328545), (63, 318115), (105, 190869), (147, 136335), (149, 134505), (183, 109515), (245, 81801), (305, 65709), (315, 63623), (427, 46935), (441, 45445), (447, 44835), (549, 36505), (735, 27267), (745, 26901), (915, 21903), (1043, 19215), (1281, 15645), (1341, 14945), (2135, 9387), (2205, 9089), (2235, 8967), (2745, 7301), (2989, 6705), (3129, 6405), (3843, 5215)]