21325276

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{631}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 45868032

約数和(自身を除く): 24542756

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 68, 71, 119, 142, 238, 284, 476, 497, 631, 994, 1207, 1262, 1988, 2414, 2524, 4417, 4828, 8449, 8834, 10727, 16898, 17668, 21454, 33796, 42908, 44801, 75089, 89602, 150178, 179204, 300356, 313607, 627214, 761617, 1254428, 1523234, 3046468, 5331319, 10662638, 21325276]

約数ペア:

[(1, 21325276), (2, 10662638), (4, 5331319), (7, 3046468), (14, 1523234), (17, 1254428), (28, 761617), (34, 627214), (68, 313607), (71, 300356), (119, 179204), (142, 150178), (238, 89602), (284, 75089), (476, 44801), (497, 42908), (631, 33796), (994, 21454), (1207, 17668), (1262, 16898), (1988, 10727), (2414, 8834), (2524, 8449), (4417, 4828)]