21999875

素因数分解:

$5^3\times {\mathrm{43}}^1\times {\mathrm{4093}}^1$

素因数の和:4151

約数の個数: 16

約数和(自身を含む): 28101216

約数和(自身を除く): 6101341

約数列:

[1, 5, 25, 43, 125, 215, 1075, 4093, 5375, 20465, 102325, 175999, 511625, 879995, 4399975, 21999875]

約数ペア:

[(1, 21999875), (5, 4399975), (25, 879995), (43, 511625), (125, 175999), (215, 102325), (1075, 20465), (4093, 5375)]