21282780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{431}}^1\times {\mathrm{823}}^1$

素因数の和:1266

約数の個数: 48

約数和(自身を含む): 59802624

約数和(自身を除く): 38519844

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 431, 823, 862, 1293, 1646, 1724, 2155, 2469, 2586, 3292, 4115, 4310, 4938, 5172, 6465, 8230, 8620, 9876, 12345, 12930, 16460, 24690, 25860, 49380, 354713, 709426, 1064139, 1418852, 1773565, 2128278, 3547130, 4256556, 5320695, 7094260, 10641390, 21282780]

約数ペア:

[(1, 21282780), (2, 10641390), (3, 7094260), (4, 5320695), (5, 4256556), (6, 3547130), (10, 2128278), (12, 1773565), (15, 1418852), (20, 1064139), (30, 709426), (60, 354713), (431, 49380), (823, 25860), (862, 24690), (1293, 16460), (1646, 12930), (1724, 12345), (2155, 9876), (2469, 8620), (2586, 8230), (3292, 6465), (4115, 5172), (4310, 4938)]