19821250

素因数分解:

$2^1\times 5^4\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:280

約数の個数: 40

約数和(自身を含む): 37759788

約数和(自身を除く): 17938538

約数列:

[1, 2, 5, 10, 25, 50, 101, 125, 157, 202, 250, 314, 505, 625, 785, 1010, 1250, 1570, 2525, 3925, 5050, 7850, 12625, 15857, 19625, 25250, 31714, 39250, 63125, 79285, 98125, 126250, 158570, 196250, 396425, 792850, 1982125, 3964250, 9910625, 19821250]

約数ペア:

[(1, 19821250), (2, 9910625), (5, 3964250), (10, 1982125), (25, 792850), (50, 396425), (101, 196250), (125, 158570), (157, 126250), (202, 98125), (250, 79285), (314, 63125), (505, 39250), (625, 31714), (785, 25250), (1010, 19625), (1250, 15857), (1570, 12625), (2525, 7850), (3925, 5050)]