21695245

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1597}}^1$

素因数の和:1645

約数の個数: 32

約数和(自身を含む): 32215680

約数和(自身を除く): 10520435

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 143, 209, 247, 715, 1045, 1235, 1597, 2717, 7985, 13585, 17567, 20761, 30343, 87835, 103805, 151715, 228371, 333773, 394459, 1141855, 1668865, 1972295, 4339049, 21695245]

約数ペア:

[(1, 21695245), (5, 4339049), (11, 1972295), (13, 1668865), (19, 1141855), (55, 394459), (65, 333773), (95, 228371), (143, 151715), (209, 103805), (247, 87835), (715, 30343), (1045, 20761), (1235, 17567), (1597, 13585), (2717, 7985)]