20120492

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 42470400

約数和(自身を除く): 22349908

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 92, 157, 161, 199, 314, 322, 398, 628, 644, 796, 1099, 1393, 2198, 2786, 3611, 4396, 4577, 5572, 7222, 9154, 14444, 18308, 25277, 31243, 32039, 50554, 62486, 64078, 101108, 124972, 128156, 218701, 437402, 718589, 874804, 1437178, 2874356, 5030123, 10060246, 20120492]

約数ペア:

[(1, 20120492), (2, 10060246), (4, 5030123), (7, 2874356), (14, 1437178), (23, 874804), (28, 718589), (46, 437402), (92, 218701), (157, 128156), (161, 124972), (199, 101108), (314, 64078), (322, 62486), (398, 50554), (628, 32039), (644, 31243), (796, 25277), (1099, 18308), (1393, 14444), (2198, 9154), (2786, 7222), (3611, 5572), (4396, 4577)]