21315105

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{431}}^1$

素因数の和:606

約数の個数: 48

約数和(自身を含む): 42591744

約数和(自身を除く): 21276639

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 157, 315, 431, 471, 785, 1099, 1293, 1413, 2155, 2355, 3017, 3297, 3879, 5495, 6465, 7065, 9051, 9891, 15085, 16485, 19395, 27153, 45255, 49455, 67667, 135765, 203001, 338335, 473669, 609003, 1015005, 1421007, 2368345, 3045015, 4263021, 7105035, 21315105]

約数ペア:

[(1, 21315105), (3, 7105035), (5, 4263021), (7, 3045015), (9, 2368345), (15, 1421007), (21, 1015005), (35, 609003), (45, 473669), (63, 338335), (105, 203001), (157, 135765), (315, 67667), (431, 49455), (471, 45255), (785, 27153), (1099, 19395), (1293, 16485), (1413, 15085), (2155, 9891), (2355, 9051), (3017, 7065), (3297, 6465), (3879, 5495)]