19905008

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1597}}^1$

素因数の和:1665

約数の個数: 40

約数和(自身を含む): 41611920

約数和(自身を除く): 21706912

約数列:

[1, 2, 4, 8, 16, 19, 38, 41, 76, 82, 152, 164, 304, 328, 656, 779, 1558, 1597, 3116, 3194, 6232, 6388, 12464, 12776, 25552, 30343, 60686, 65477, 121372, 130954, 242744, 261908, 485488, 523816, 1047632, 1244063, 2488126, 4976252, 9952504, 19905008]

約数ペア:

[(1, 19905008), (2, 9952504), (4, 4976252), (8, 2488126), (16, 1244063), (19, 1047632), (38, 523816), (41, 485488), (76, 261908), (82, 242744), (152, 130954), (164, 121372), (304, 65477), (328, 60686), (656, 30343), (779, 25552), (1558, 12776), (1597, 12464), (3116, 6388), (3194, 6232)]