20457465

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 40144896

約数和(自身を除く): 19687431

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 43, 69, 105, 115, 129, 161, 197, 215, 301, 345, 483, 591, 645, 805, 903, 985, 989, 1379, 1505, 2415, 2955, 2967, 4137, 4515, 4531, 4945, 6895, 6923, 8471, 13593, 14835, 20685, 20769, 22655, 25413, 31717, 34615, 42355, 59297, 67965, 95151, 103845, 127065, 158585, 177891, 194833, 296485, 475755, 584499, 889455, 974165, 1363831, 2922495, 4091493, 6819155, 20457465]

約数ペア:

[(1, 20457465), (3, 6819155), (5, 4091493), (7, 2922495), (15, 1363831), (21, 974165), (23, 889455), (35, 584499), (43, 475755), (69, 296485), (105, 194833), (115, 177891), (129, 158585), (161, 127065), (197, 103845), (215, 95151), (301, 67965), (345, 59297), (483, 42355), (591, 34615), (645, 31717), (805, 25413), (903, 22655), (985, 20769), (989, 20685), (1379, 14835), (1505, 13593), (2415, 8471), (2955, 6923), (2967, 6895), (4137, 4945), (4515, 4531)]