19964385

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1039}}^1$

素因数の和:1118

約数の個数: 48

約数和(自身を含む): 40235520

約数和(自身を除く): 20271135

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 61, 63, 105, 183, 305, 315, 427, 549, 915, 1039, 1281, 2135, 2745, 3117, 3843, 5195, 6405, 7273, 9351, 15585, 19215, 21819, 36365, 46755, 63379, 65457, 109095, 190137, 316895, 327285, 443653, 570411, 950685, 1330959, 2218265, 2852055, 3992877, 6654795, 19964385]

約数ペア:

[(1, 19964385), (3, 6654795), (5, 3992877), (7, 2852055), (9, 2218265), (15, 1330959), (21, 950685), (35, 570411), (45, 443653), (61, 327285), (63, 316895), (105, 190137), (183, 109095), (305, 65457), (315, 63379), (427, 46755), (549, 36365), (915, 21819), (1039, 19215), (1281, 15585), (2135, 9351), (2745, 7273), (3117, 6405), (3843, 5195)]