21604905

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{641}}^1$

素因数の和:766

約数の個数: 48

約数和(自身を含む): 43265664

約数和(自身を除く): 21660759

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 107, 315, 321, 535, 641, 749, 963, 1605, 1923, 2247, 3205, 3745, 4487, 4815, 5769, 6741, 9615, 11235, 13461, 22435, 28845, 33705, 40383, 67305, 68587, 201915, 205761, 342935, 480109, 617283, 1028805, 1440327, 2400545, 3086415, 4320981, 7201635, 21604905]

約数ペア:

[(1, 21604905), (3, 7201635), (5, 4320981), (7, 3086415), (9, 2400545), (15, 1440327), (21, 1028805), (35, 617283), (45, 480109), (63, 342935), (105, 205761), (107, 201915), (315, 68587), (321, 67305), (535, 40383), (641, 33705), (749, 28845), (963, 22435), (1605, 13461), (1923, 11235), (2247, 9615), (3205, 6741), (3745, 5769), (4487, 4815)]