21399160

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{6011}}^1$

素因数の和:6111

約数の個数: 32

約数和(自身を含む): 48697200

約数和(自身を除く): 27298040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 6011, 12022, 24044, 30055, 48088, 60110, 120220, 240440, 534979, 1069958, 2139916, 2674895, 4279832, 5349790, 10699580, 21399160]

約数ペア:

[(1, 21399160), (2, 10699580), (4, 5349790), (5, 4279832), (8, 2674895), (10, 2139916), (20, 1069958), (40, 534979), (89, 240440), (178, 120220), (356, 60110), (445, 48088), (712, 30055), (890, 24044), (1780, 12022), (3560, 6011)]