20813968

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{9781}}^1$

素因数の和:9815

約数の個数: 40

約数和(自身を含む): 48518720

約数和(自身を除く): 27704752

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 532, 1064, 2128, 9781, 19562, 39124, 68467, 78248, 136934, 156496, 185839, 273868, 371678, 547736, 743356, 1095472, 1300873, 1486712, 2601746, 2973424, 5203492, 10406984, 20813968]

約数ペア:

[(1, 20813968), (2, 10406984), (4, 5203492), (7, 2973424), (8, 2601746), (14, 1486712), (16, 1300873), (19, 1095472), (28, 743356), (38, 547736), (56, 371678), (76, 273868), (112, 185839), (133, 156496), (152, 136934), (266, 78248), (304, 68467), (532, 39124), (1064, 19562), (2128, 9781)]