20897415

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{163}}^1$

素因数の和:229

約数の個数: 96

約数和(自身を含む): 46665216

約数和(自身を除く): 25767801

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 37, 45, 55, 63, 77, 99, 105, 111, 163, 165, 185, 231, 259, 315, 333, 385, 407, 489, 495, 555, 693, 777, 815, 1141, 1155, 1221, 1295, 1467, 1665, 1793, 2035, 2331, 2445, 2849, 3423, 3465, 3663, 3885, 5379, 5705, 6031, 6105, 7335, 8547, 8965, 10269, 11655, 12551, 14245, 16137, 17115, 18093, 18315, 25641, 26895, 30155, 37653, 42217, 42735, 51345, 54279, 62755, 66341, 80685, 90465, 112959, 126651, 128205, 188265, 199023, 211085, 271395, 331705, 379953, 464387, 564795, 597069, 633255, 995115, 1393161, 1899765, 2321935, 2985345, 4179483, 6965805, 20897415]

約数ペア:

[(1, 20897415), (3, 6965805), (5, 4179483), (7, 2985345), (9, 2321935), (11, 1899765), (15, 1393161), (21, 995115), (33, 633255), (35, 597069), (37, 564795), (45, 464387), (55, 379953), (63, 331705), (77, 271395), (99, 211085), (105, 199023), (111, 188265), (163, 128205), (165, 126651), (185, 112959), (231, 90465), (259, 80685), (315, 66341), (333, 62755), (385, 54279), (407, 51345), (489, 42735), (495, 42217), (555, 37653), (693, 30155), (777, 26895), (815, 25641), (1141, 18315), (1155, 18093), (1221, 17115), (1295, 16137), (1467, 14245), (1665, 12551), (1793, 11655), (2035, 10269), (2331, 8965), (2445, 8547), (2849, 7335), (3423, 6105), (3465, 6031), (3663, 5705), (3885, 5379)]