18563960

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{251}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 42933240

約数和(自身を除く): 24369280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 251, 344, 430, 502, 860, 1004, 1255, 1720, 1849, 2008, 2510, 3698, 5020, 7396, 9245, 10040, 10793, 14792, 18490, 21586, 36980, 43172, 53965, 73960, 86344, 107930, 215860, 431720, 464099, 928198, 1856396, 2320495, 3712792, 4640990, 9281980, 18563960]

約数ペア:

[(1, 18563960), (2, 9281980), (4, 4640990), (5, 3712792), (8, 2320495), (10, 1856396), (20, 928198), (40, 464099), (43, 431720), (86, 215860), (172, 107930), (215, 86344), (251, 73960), (344, 53965), (430, 43172), (502, 36980), (860, 21586), (1004, 18490), (1255, 14792), (1720, 10793), (1849, 10040), (2008, 9245), (2510, 7396), (3698, 5020)]