21403965

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1777}}^1$

素因数の和:1869

約数の個数: 32

約数和(自身を含む): 37892736

約数和(自身を除く): 16488771

約数列:

[1, 3, 5, 11, 15, 33, 55, 73, 165, 219, 365, 803, 1095, 1777, 2409, 4015, 5331, 8885, 12045, 19547, 26655, 58641, 97735, 129721, 293205, 389163, 648605, 1426931, 1945815, 4280793, 7134655, 21403965]

約数ペア:

[(1, 21403965), (3, 7134655), (5, 4280793), (11, 1945815), (15, 1426931), (33, 648605), (55, 389163), (73, 293205), (165, 129721), (219, 97735), (365, 58641), (803, 26655), (1095, 19547), (1777, 12045), (2409, 8885), (4015, 5331)]