81919160

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{23011}}^1$

素因数の和:23111

約数の個数: 32

約数和(自身を含む): 186397200

約数和(自身を除く): 104478040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 23011, 46022, 92044, 115055, 184088, 230110, 460220, 920440, 2047979, 4095958, 8191916, 10239895, 16383832, 20479790, 40959580, 81919160]

約数ペア:

[(1, 81919160), (2, 40959580), (4, 20479790), (5, 16383832), (8, 10239895), (10, 8191916), (20, 4095958), (40, 2047979), (89, 920440), (178, 460220), (356, 230110), (445, 184088), (712, 115055), (890, 92044), (1780, 46022), (3560, 23011)]