20987748

素因数分解:

$2^2\times 3^4\times {\mathrm{211}}^1\times {\mathrm{307}}^1$

素因数の和:534

約数の個数: 60

約数和(自身を含む): 55305712

約数和(自身を除く): 34317964

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 211, 307, 324, 422, 614, 633, 844, 921, 1228, 1266, 1842, 1899, 2532, 2763, 3684, 3798, 5526, 5697, 7596, 8289, 11052, 11394, 16578, 17091, 22788, 24867, 33156, 34182, 49734, 64777, 68364, 99468, 129554, 194331, 259108, 388662, 582993, 777324, 1165986, 1748979, 2331972, 3497958, 5246937, 6995916, 10493874, 20987748]

約数ペア:

[(1, 20987748), (2, 10493874), (3, 6995916), (4, 5246937), (6, 3497958), (9, 2331972), (12, 1748979), (18, 1165986), (27, 777324), (36, 582993), (54, 388662), (81, 259108), (108, 194331), (162, 129554), (211, 99468), (307, 68364), (324, 64777), (422, 49734), (614, 34182), (633, 33156), (844, 24867), (921, 22788), (1228, 17091), (1266, 16578), (1842, 11394), (1899, 11052), (2532, 8289), (2763, 7596), (3684, 5697), (3798, 5526)]