9998750

素因数分解:

$2^1\times 5^4\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:462

約数の個数: 40

約数和(自身を含む): 19774920

約数和(自身を除く): 9776170

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 125, 190, 250, 421, 475, 625, 842, 950, 1250, 2105, 2375, 4210, 4750, 7999, 10525, 11875, 15998, 21050, 23750, 39995, 52625, 79990, 105250, 199975, 263125, 399950, 526250, 999875, 1999750, 4999375, 9998750]

約数ペア:

[(1, 9998750), (2, 4999375), (5, 1999750), (10, 999875), (19, 526250), (25, 399950), (38, 263125), (50, 199975), (95, 105250), (125, 79990), (190, 52625), (250, 39995), (421, 23750), (475, 21050), (625, 15998), (842, 11875), (950, 10525), (1250, 7999), (2105, 4750), (2375, 4210)]