21047820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{499}}^1$

素因数の和:567

約数の個数: 96

約数和(自身を含む): 63840000

約数和(自身を除く): 42792180

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 37, 38, 57, 60, 74, 76, 95, 111, 114, 148, 185, 190, 222, 228, 285, 370, 380, 444, 499, 555, 570, 703, 740, 998, 1110, 1140, 1406, 1497, 1996, 2109, 2220, 2495, 2812, 2994, 3515, 4218, 4990, 5988, 7030, 7485, 8436, 9481, 9980, 10545, 14060, 14970, 18463, 18962, 21090, 28443, 29940, 36926, 37924, 42180, 47405, 55389, 56886, 73852, 92315, 94810, 110778, 113772, 142215, 184630, 189620, 221556, 276945, 284430, 350797, 369260, 553890, 568860, 701594, 1052391, 1107780, 1403188, 1753985, 2104782, 3507970, 4209564, 5261955, 7015940, 10523910, 21047820]

約数ペア:

[(1, 21047820), (2, 10523910), (3, 7015940), (4, 5261955), (5, 4209564), (6, 3507970), (10, 2104782), (12, 1753985), (15, 1403188), (19, 1107780), (20, 1052391), (30, 701594), (37, 568860), (38, 553890), (57, 369260), (60, 350797), (74, 284430), (76, 276945), (95, 221556), (111, 189620), (114, 184630), (148, 142215), (185, 113772), (190, 110778), (222, 94810), (228, 92315), (285, 73852), (370, 56886), (380, 55389), (444, 47405), (499, 42180), (555, 37924), (570, 36926), (703, 29940), (740, 28443), (998, 21090), (1110, 18962), (1140, 18463), (1406, 14970), (1497, 14060), (1996, 10545), (2109, 9980), (2220, 9481), (2495, 8436), (2812, 7485), (2994, 7030), (3515, 5988), (4218, 4990)]