20912584

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1997}}^1$

素因数の和:2038

約数の個数: 64

約数和(自身を含む): 51788160

約数和(自身を除く): 30875576

約数列:

[1, 2, 4, 7, 8, 11, 14, 17, 22, 28, 34, 44, 56, 68, 77, 88, 119, 136, 154, 187, 238, 308, 374, 476, 616, 748, 952, 1309, 1496, 1997, 2618, 3994, 5236, 7988, 10472, 13979, 15976, 21967, 27958, 33949, 43934, 55916, 67898, 87868, 111832, 135796, 153769, 175736, 237643, 271592, 307538, 373439, 475286, 615076, 746878, 950572, 1230152, 1493756, 1901144, 2614073, 2987512, 5228146, 10456292, 20912584]

約数ペア:

[(1, 20912584), (2, 10456292), (4, 5228146), (7, 2987512), (8, 2614073), (11, 1901144), (14, 1493756), (17, 1230152), (22, 950572), (28, 746878), (34, 615076), (44, 475286), (56, 373439), (68, 307538), (77, 271592), (88, 237643), (119, 175736), (136, 153769), (154, 135796), (187, 111832), (238, 87868), (308, 67898), (374, 55916), (476, 43934), (616, 33949), (748, 27958), (952, 21967), (1309, 15976), (1496, 13979), (1997, 10472), (2618, 7988), (3994, 5236)]