19939120

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6079}}^1$

素因数の和:6133

約数の個数: 40

約数和(自身を含む): 47496960

約数和(自身を除く): 27557840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6079, 12158, 24316, 30395, 48632, 60790, 97264, 121580, 243160, 249239, 486320, 498478, 996956, 1246195, 1993912, 2492390, 3987824, 4984780, 9969560, 19939120]

約数ペア:

[(1, 19939120), (2, 9969560), (4, 4984780), (5, 3987824), (8, 2492390), (10, 1993912), (16, 1246195), (20, 996956), (40, 498478), (41, 486320), (80, 249239), (82, 243160), (164, 121580), (205, 97264), (328, 60790), (410, 48632), (656, 30395), (820, 24316), (1640, 12158), (3280, 6079)]