21028900

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{223}}^1$

素因数の和:301

約数の個数: 72

約数和(自身を含む): 48996864

約数和(自身を除く): 27967964

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 41, 46, 50, 82, 92, 100, 115, 164, 205, 223, 230, 410, 446, 460, 575, 820, 892, 943, 1025, 1115, 1150, 1886, 2050, 2230, 2300, 3772, 4100, 4460, 4715, 5129, 5575, 9143, 9430, 10258, 11150, 18286, 18860, 20516, 22300, 23575, 25645, 36572, 45715, 47150, 51290, 91430, 94300, 102580, 128225, 182860, 210289, 228575, 256450, 420578, 457150, 512900, 841156, 914300, 1051445, 2102890, 4205780, 5257225, 10514450, 21028900]

約数ペア:

[(1, 21028900), (2, 10514450), (4, 5257225), (5, 4205780), (10, 2102890), (20, 1051445), (23, 914300), (25, 841156), (41, 512900), (46, 457150), (50, 420578), (82, 256450), (92, 228575), (100, 210289), (115, 182860), (164, 128225), (205, 102580), (223, 94300), (230, 91430), (410, 51290), (446, 47150), (460, 45715), (575, 36572), (820, 25645), (892, 23575), (943, 22300), (1025, 20516), (1115, 18860), (1150, 18286), (1886, 11150), (2050, 10258), (2230, 9430), (2300, 9143), (3772, 5575), (4100, 5129), (4460, 4715)]