20389005

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{383}}^1$

素因数の和:427

約数の個数: 72

約数和(自身を含む): 43849728

約数和(自身を除く): 23460723

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 91, 105, 117, 169, 195, 273, 315, 383, 455, 507, 585, 819, 845, 1149, 1183, 1365, 1521, 1915, 2535, 2681, 3447, 3549, 4095, 4979, 5745, 5915, 7605, 8043, 10647, 13405, 14937, 17235, 17745, 24129, 24895, 34853, 40215, 44811, 53235, 64727, 74685, 104559, 120645, 174265, 194181, 224055, 313677, 323635, 453089, 522795, 582543, 970905, 1359267, 1568385, 2265445, 2912715, 4077801, 6796335, 20389005]

約数ペア:

[(1, 20389005), (3, 6796335), (5, 4077801), (7, 2912715), (9, 2265445), (13, 1568385), (15, 1359267), (21, 970905), (35, 582543), (39, 522795), (45, 453089), (63, 323635), (65, 313677), (91, 224055), (105, 194181), (117, 174265), (169, 120645), (195, 104559), (273, 74685), (315, 64727), (383, 53235), (455, 44811), (507, 40215), (585, 34853), (819, 24895), (845, 24129), (1149, 17745), (1183, 17235), (1365, 14937), (1521, 13405), (1915, 10647), (2535, 8043), (2681, 7605), (3447, 5915), (3549, 5745), (4095, 4979)]