20393415

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{641}}^1$

素因数の和:760

約数の個数: 48

約数和(自身を含む): 40862016

約数和(自身を除く): 20468601

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 101, 105, 303, 315, 505, 641, 707, 909, 1515, 1923, 2121, 3205, 3535, 4487, 4545, 5769, 6363, 9615, 10605, 13461, 22435, 28845, 31815, 40383, 64741, 67305, 194223, 201915, 323705, 453187, 582669, 971115, 1359561, 2265935, 2913345, 4078683, 6797805, 20393415]

約数ペア:

[(1, 20393415), (3, 6797805), (5, 4078683), (7, 2913345), (9, 2265935), (15, 1359561), (21, 971115), (35, 582669), (45, 453187), (63, 323705), (101, 201915), (105, 194223), (303, 67305), (315, 64741), (505, 40383), (641, 31815), (707, 28845), (909, 22435), (1515, 13461), (1923, 10605), (2121, 9615), (3205, 6363), (3535, 5769), (4487, 4545)]