21123452

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 45158400

約数和(自身を除く): 24034948

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 68, 119, 199, 223, 238, 398, 446, 476, 796, 892, 1393, 1561, 2786, 3122, 3383, 3791, 5572, 6244, 6766, 7582, 13532, 15164, 23681, 26537, 44377, 47362, 53074, 88754, 94724, 106148, 177508, 310639, 621278, 754409, 1242556, 1508818, 3017636, 5280863, 10561726, 21123452]

約数ペア:

[(1, 21123452), (2, 10561726), (4, 5280863), (7, 3017636), (14, 1508818), (17, 1242556), (28, 754409), (34, 621278), (68, 310639), (119, 177508), (199, 106148), (223, 94724), (238, 88754), (398, 53074), (446, 47362), (476, 44377), (796, 26537), (892, 23681), (1393, 15164), (1561, 13532), (2786, 7582), (3122, 6766), (3383, 6244), (3791, 5572)]