20872845

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:151

約数の個数: 96

約数和(自身を含む): 44808192

約数和(自身を除く): 23935347

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 35, 43, 45, 63, 67, 69, 105, 115, 129, 161, 201, 207, 215, 301, 315, 335, 345, 387, 469, 483, 603, 645, 805, 903, 989, 1005, 1035, 1407, 1449, 1505, 1541, 1935, 2345, 2415, 2709, 2881, 2967, 3015, 4221, 4515, 4623, 4945, 6923, 7035, 7245, 7705, 8643, 8901, 10787, 13545, 13869, 14405, 14835, 20167, 20769, 21105, 23115, 25929, 32361, 34615, 43215, 44505, 53935, 60501, 62307, 66263, 69345, 97083, 100835, 103845, 129645, 161805, 181503, 198789, 302505, 311535, 331315, 463841, 485415, 596367, 907515, 993945, 1391523, 2319205, 2981835, 4174569, 6957615, 20872845]

約数ペア:

[(1, 20872845), (3, 6957615), (5, 4174569), (7, 2981835), (9, 2319205), (15, 1391523), (21, 993945), (23, 907515), (35, 596367), (43, 485415), (45, 463841), (63, 331315), (67, 311535), (69, 302505), (105, 198789), (115, 181503), (129, 161805), (161, 129645), (201, 103845), (207, 100835), (215, 97083), (301, 69345), (315, 66263), (335, 62307), (345, 60501), (387, 53935), (469, 44505), (483, 43215), (603, 34615), (645, 32361), (805, 25929), (903, 23115), (989, 21105), (1005, 20769), (1035, 20167), (1407, 14835), (1449, 14405), (1505, 13869), (1541, 13545), (1935, 10787), (2345, 8901), (2415, 8643), (2709, 7705), (2881, 7245), (2967, 7035), (3015, 6923), (4221, 4945), (4515, 4623)]