21328190

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{359}}^1\times {\mathrm{457}}^1$

素因数の和:836

約数の個数: 32

約数和(自身を含む): 41549760

約数和(自身を除く): 20221570

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 359, 457, 718, 914, 1795, 2285, 3590, 4570, 4667, 5941, 9334, 11882, 23335, 29705, 46670, 59410, 164063, 328126, 820315, 1640630, 2132819, 4265638, 10664095, 21328190]

約数ペア:

[(1, 21328190), (2, 10664095), (5, 4265638), (10, 2132819), (13, 1640630), (26, 820315), (65, 328126), (130, 164063), (359, 59410), (457, 46670), (718, 29705), (914, 23335), (1795, 11882), (2285, 9334), (3590, 5941), (4570, 4667)]