20218518

素因数分解:

$2^1\times 3^3\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{223}}^1$

素因数の和:330

約数の個数: 64

約数和(自身を含む): 47738880

約数和(自身を除く): 27520362

約数列:

[1, 2, 3, 6, 9, 18, 23, 27, 46, 54, 69, 73, 138, 146, 207, 219, 223, 414, 438, 446, 621, 657, 669, 1242, 1314, 1338, 1679, 1971, 2007, 3358, 3942, 4014, 5037, 5129, 6021, 10074, 10258, 12042, 15111, 15387, 16279, 30222, 30774, 32558, 45333, 46161, 48837, 90666, 92322, 97674, 138483, 146511, 276966, 293022, 374417, 439533, 748834, 879066, 1123251, 2246502, 3369753, 6739506, 10109259, 20218518]

約数ペア:

[(1, 20218518), (2, 10109259), (3, 6739506), (6, 3369753), (9, 2246502), (18, 1123251), (23, 879066), (27, 748834), (46, 439533), (54, 374417), (69, 293022), (73, 276966), (138, 146511), (146, 138483), (207, 97674), (219, 92322), (223, 90666), (414, 48837), (438, 46161), (446, 45333), (621, 32558), (657, 30774), (669, 30222), (1242, 16279), (1314, 15387), (1338, 15111), (1679, 12042), (1971, 10258), (2007, 10074), (3358, 6021), (3942, 5129), (4014, 5037)]