19877420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{181}}^1$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 46934160

約数和(自身を除く): 27056740

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 170, 181, 190, 289, 323, 340, 362, 380, 578, 646, 724, 905, 1156, 1292, 1445, 1615, 1810, 2890, 3077, 3230, 3439, 3620, 5491, 5780, 6154, 6460, 6878, 10982, 12308, 13756, 15385, 17195, 21964, 27455, 30770, 34390, 52309, 54910, 58463, 61540, 68780, 104618, 109820, 116926, 209236, 233852, 261545, 292315, 523090, 584630, 993871, 1046180, 1169260, 1987742, 3975484, 4969355, 9938710, 19877420]

約数ペア:

[(1, 19877420), (2, 9938710), (4, 4969355), (5, 3975484), (10, 1987742), (17, 1169260), (19, 1046180), (20, 993871), (34, 584630), (38, 523090), (68, 292315), (76, 261545), (85, 233852), (95, 209236), (170, 116926), (181, 109820), (190, 104618), (289, 68780), (323, 61540), (340, 58463), (362, 54910), (380, 52309), (578, 34390), (646, 30770), (724, 27455), (905, 21964), (1156, 17195), (1292, 15385), (1445, 13756), (1615, 12308), (1810, 10982), (2890, 6878), (3077, 6460), (3230, 6154), (3439, 5780), (3620, 5491)]