20512197894

素因数分解:

$2^1\times 3^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{349}}^1\times {\mathrm{1451}}^1$

素因数の和:2005

約数の個数: 64

約数和(自身を含む): 42396076800

約数和(自身を除く): 21883878906

約数列:

[1, 2, 3, 6, 43, 86, 129, 157, 258, 314, 349, 471, 698, 942, 1047, 1451, 2094, 2902, 4353, 6751, 8706, 13502, 15007, 20253, 30014, 40506, 45021, 54793, 62393, 90042, 109586, 124786, 164379, 187179, 227807, 328758, 374358, 455614, 506399, 683421, 1012798, 1366842, 1519197, 2356099, 3038394, 4712198, 7068297, 9795701, 14136594, 19591402, 21775157, 29387103, 43550314, 58774206, 65325471, 79504643, 130650942, 159009286, 238513929, 477027858, 3418699649, 6837399298, 10256098947, 20512197894]

約数ペア:

[(1, 20512197894), (2, 10256098947), (3, 6837399298), (6, 3418699649), (43, 477027858), (86, 238513929), (129, 159009286), (157, 130650942), (258, 79504643), (314, 65325471), (349, 58774206), (471, 43550314), (698, 29387103), (942, 21775157), (1047, 19591402), (1451, 14136594), (2094, 9795701), (2902, 7068297), (4353, 4712198), (6751, 3038394), (8706, 2356099), (13502, 1519197), (15007, 1366842), (20253, 1012798), (30014, 683421), (40506, 506399), (45021, 455614), (54793, 374358), (62393, 328758), (90042, 227807), (109586, 187179), (124786, 164379)]