20921355

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{131}}^1$

素因数の和:178

約数の個数: 96

約数和(自身を含む): 46379520

約数和(自身を除く): 25458165

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 63, 65, 91, 105, 117, 131, 135, 169, 189, 195, 273, 315, 351, 393, 455, 507, 585, 655, 819, 845, 917, 945, 1179, 1183, 1365, 1521, 1703, 1755, 1965, 2457, 2535, 2751, 3537, 3549, 4095, 4563, 4585, 5109, 5895, 5915, 7605, 8253, 8515, 10647, 11921, 12285, 13755, 15327, 17685, 17745, 22139, 22815, 24759, 25545, 31941, 35763, 41265, 45981, 53235, 59605, 66417, 76635, 107289, 110695, 123795, 154973, 159705, 178815, 199251, 229905, 321867, 332085, 464919, 536445, 597753, 774865, 996255, 1394757, 1609335, 2324595, 2988765, 4184271, 6973785, 20921355]

約数ペア:

[(1, 20921355), (3, 6973785), (5, 4184271), (7, 2988765), (9, 2324595), (13, 1609335), (15, 1394757), (21, 996255), (27, 774865), (35, 597753), (39, 536445), (45, 464919), (63, 332085), (65, 321867), (91, 229905), (105, 199251), (117, 178815), (131, 159705), (135, 154973), (169, 123795), (189, 110695), (195, 107289), (273, 76635), (315, 66417), (351, 59605), (393, 53235), (455, 45981), (507, 41265), (585, 35763), (655, 31941), (819, 25545), (845, 24759), (917, 22815), (945, 22139), (1179, 17745), (1183, 17685), (1365, 15327), (1521, 13755), (1703, 12285), (1755, 11921), (1965, 10647), (2457, 8515), (2535, 8253), (2751, 7605), (3537, 5915), (3549, 5895), (4095, 5109), (4563, 4585)]