21340280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41039}}^1$

素因数の和:41063

約数の個数: 32

約数和(自身を含む): 51710400

約数和(自身を除く): 30370120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41039, 82078, 164156, 205195, 328312, 410390, 533507, 820780, 1067014, 1641560, 2134028, 2667535, 4268056, 5335070, 10670140, 21340280]

約数ペア:

[(1, 21340280), (2, 10670140), (4, 5335070), (5, 4268056), (8, 2667535), (10, 2134028), (13, 1641560), (20, 1067014), (26, 820780), (40, 533507), (52, 410390), (65, 328312), (104, 205195), (130, 164156), (260, 82078), (520, 41039)]