21319520

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{7013}}^1$

素因数の和:7047

約数の個数: 48

約数和(自身を含む): 53025840

約数和(自身を除く): 31706320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 7013, 14026, 28052, 35065, 56104, 70130, 112208, 133247, 140260, 224416, 266494, 280520, 532988, 561040, 666235, 1065976, 1122080, 1332470, 2131952, 2664940, 4263904, 5329880, 10659760, 21319520]

約数ペア:

[(1, 21319520), (2, 10659760), (4, 5329880), (5, 4263904), (8, 2664940), (10, 2131952), (16, 1332470), (19, 1122080), (20, 1065976), (32, 666235), (38, 561040), (40, 532988), (76, 280520), (80, 266494), (95, 224416), (152, 140260), (160, 133247), (190, 112208), (304, 70130), (380, 56104), (608, 35065), (760, 28052), (1520, 14026), (3040, 7013)]