2128900

素因数分解:

$2^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{349}}^1$

素因数の和:424

約数の個数: 36

約数和(自身を含む): 4708900

約数和(自身を除く): 2580000

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 244, 305, 349, 610, 698, 1220, 1396, 1525, 1745, 3050, 3490, 6100, 6980, 8725, 17450, 21289, 34900, 42578, 85156, 106445, 212890, 425780, 532225, 1064450, 2128900]

約数ペア:

[(1, 2128900), (2, 1064450), (4, 532225), (5, 425780), (10, 212890), (20, 106445), (25, 85156), (50, 42578), (61, 34900), (100, 21289), (122, 17450), (244, 8725), (305, 6980), (349, 6100), (610, 3490), (698, 3050), (1220, 1745), (1396, 1525)]