21804920

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{173}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 51865920

約数和(自身を除く): 30061000

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 137, 173, 184, 230, 274, 346, 460, 548, 685, 692, 865, 920, 1096, 1370, 1384, 1730, 2740, 3151, 3460, 3979, 5480, 6302, 6920, 7958, 12604, 15755, 15916, 19895, 23701, 25208, 31510, 31832, 39790, 47402, 63020, 79580, 94804, 118505, 126040, 159160, 189608, 237010, 474020, 545123, 948040, 1090246, 2180492, 2725615, 4360984, 5451230, 10902460, 21804920]

約数ペア:

[(1, 21804920), (2, 10902460), (4, 5451230), (5, 4360984), (8, 2725615), (10, 2180492), (20, 1090246), (23, 948040), (40, 545123), (46, 474020), (92, 237010), (115, 189608), (137, 159160), (173, 126040), (184, 118505), (230, 94804), (274, 79580), (346, 63020), (460, 47402), (548, 39790), (685, 31832), (692, 31510), (865, 25208), (920, 23701), (1096, 19895), (1370, 15916), (1384, 15755), (1730, 12604), (2740, 7958), (3151, 6920), (3460, 6302), (3979, 5480)]