20450128

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{911}}^1$

素因数の和:1003

約数の個数: 40

約数和(自身を含む): 42068736

約数和(自身を除く): 21618608

約数列:

[1, 2, 4, 8, 16, 23, 46, 61, 92, 122, 184, 244, 368, 488, 911, 976, 1403, 1822, 2806, 3644, 5612, 7288, 11224, 14576, 20953, 22448, 41906, 55571, 83812, 111142, 167624, 222284, 335248, 444568, 889136, 1278133, 2556266, 5112532, 10225064, 20450128]

約数ペア:

[(1, 20450128), (2, 10225064), (4, 5112532), (8, 2556266), (16, 1278133), (23, 889136), (46, 444568), (61, 335248), (92, 222284), (122, 167624), (184, 111142), (244, 83812), (368, 55571), (488, 41906), (911, 22448), (976, 20953), (1403, 14576), (1822, 11224), (2806, 7288), (3644, 5612)]