20187045

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{499}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 37440000

約数和(自身を除く): 17252955

約数列:

[1, 3, 5, 9, 15, 29, 31, 45, 87, 93, 145, 155, 261, 279, 435, 465, 499, 899, 1305, 1395, 1497, 2495, 2697, 4491, 4495, 7485, 8091, 13485, 14471, 15469, 22455, 40455, 43413, 46407, 72355, 77345, 130239, 139221, 217065, 232035, 448601, 651195, 696105, 1345803, 2243005, 4037409, 6729015, 20187045]

約数ペア:

[(1, 20187045), (3, 6729015), (5, 4037409), (9, 2243005), (15, 1345803), (29, 696105), (31, 651195), (45, 448601), (87, 232035), (93, 217065), (145, 139221), (155, 130239), (261, 77345), (279, 72355), (435, 46407), (465, 43413), (499, 40455), (899, 22455), (1305, 15469), (1395, 14471), (1497, 13485), (2495, 8091), (2697, 7485), (4491, 4495)]