21379275

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1667}}^1$

素因数の和:1705

約数の個数: 48

約数和(自身を含む): 41366400

約数和(自身を除く): 19987125

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 135, 171, 225, 285, 475, 513, 675, 855, 1425, 1667, 2565, 4275, 5001, 8335, 12825, 15003, 25005, 31673, 41675, 45009, 75015, 95019, 125025, 158365, 225045, 285057, 375075, 475095, 791825, 855171, 1125225, 1425285, 2375475, 4275855, 7126425, 21379275]

約数ペア:

[(1, 21379275), (3, 7126425), (5, 4275855), (9, 2375475), (15, 1425285), (19, 1125225), (25, 855171), (27, 791825), (45, 475095), (57, 375075), (75, 285057), (95, 225045), (135, 158365), (171, 125025), (225, 95019), (285, 75015), (475, 45009), (513, 41675), (675, 31673), (855, 25005), (1425, 15003), (1667, 12825), (2565, 8335), (4275, 5001)]