20003900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^2$

素因数の和:120

約数の個数: 108

約数和(自身を含む): 53840304

約数和(自身を除く): 33836404

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 25, 28, 34, 35, 41, 50, 68, 70, 82, 85, 100, 119, 140, 164, 170, 175, 205, 238, 287, 340, 350, 410, 425, 476, 574, 595, 697, 700, 820, 850, 1025, 1148, 1190, 1394, 1435, 1681, 1700, 2050, 2380, 2788, 2870, 2975, 3362, 3485, 4100, 4879, 5740, 5950, 6724, 6970, 7175, 8405, 9758, 11767, 11900, 13940, 14350, 16810, 17425, 19516, 23534, 24395, 28577, 28700, 33620, 34850, 42025, 47068, 48790, 57154, 58835, 69700, 84050, 97580, 114308, 117670, 121975, 142885, 168100, 200039, 235340, 243950, 285770, 294175, 400078, 487900, 571540, 588350, 714425, 800156, 1000195, 1176700, 1428850, 2000390, 2857700, 4000780, 5000975, 10001950, 20003900]

約数ペア:

[(1, 20003900), (2, 10001950), (4, 5000975), (5, 4000780), (7, 2857700), (10, 2000390), (14, 1428850), (17, 1176700), (20, 1000195), (25, 800156), (28, 714425), (34, 588350), (35, 571540), (41, 487900), (50, 400078), (68, 294175), (70, 285770), (82, 243950), (85, 235340), (100, 200039), (119, 168100), (140, 142885), (164, 121975), (170, 117670), (175, 114308), (205, 97580), (238, 84050), (287, 69700), (340, 58835), (350, 57154), (410, 48790), (425, 47068), (476, 42025), (574, 34850), (595, 33620), (697, 28700), (700, 28577), (820, 24395), (850, 23534), (1025, 19516), (1148, 17425), (1190, 16810), (1394, 14350), (1435, 13940), (1681, 11900), (1700, 11767), (2050, 9758), (2380, 8405), (2788, 7175), (2870, 6970), (2975, 6724), (3362, 5950), (3485, 5740), (4100, 4879)]