21180690

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:429

約数の個数: 80

約数和(自身を含む): 57847680

約数和(自身を除く): 36666990

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 79, 81, 90, 135, 158, 162, 237, 270, 331, 395, 405, 474, 662, 711, 790, 810, 993, 1185, 1422, 1655, 1986, 2133, 2370, 2979, 3310, 3555, 4266, 4965, 5958, 6399, 7110, 8937, 9930, 10665, 12798, 14895, 17874, 21330, 26149, 26811, 29790, 31995, 44685, 52298, 53622, 63990, 78447, 89370, 130745, 134055, 156894, 235341, 261490, 268110, 392235, 470682, 706023, 784470, 1176705, 1412046, 2118069, 2353410, 3530115, 4236138, 7060230, 10590345, 21180690]

約数ペア:

[(1, 21180690), (2, 10590345), (3, 7060230), (5, 4236138), (6, 3530115), (9, 2353410), (10, 2118069), (15, 1412046), (18, 1176705), (27, 784470), (30, 706023), (45, 470682), (54, 392235), (79, 268110), (81, 261490), (90, 235341), (135, 156894), (158, 134055), (162, 130745), (237, 89370), (270, 78447), (331, 63990), (395, 53622), (405, 52298), (474, 44685), (662, 31995), (711, 29790), (790, 26811), (810, 26149), (993, 21330), (1185, 17874), (1422, 14895), (1655, 12798), (1986, 10665), (2133, 9930), (2370, 8937), (2979, 7110), (3310, 6399), (3555, 5958), (4266, 4965)]