821000720

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:313

約数の個数: 160

約数和(自身を含む): 2103615360

約数和(自身を除く): 1282614640

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 43, 68, 80, 85, 86, 101, 136, 139, 170, 172, 202, 215, 272, 278, 340, 344, 404, 430, 505, 556, 680, 688, 695, 731, 808, 860, 1010, 1112, 1360, 1390, 1462, 1616, 1717, 1720, 2020, 2224, 2363, 2780, 2924, 3434, 3440, 3655, 4040, 4343, 4726, 5560, 5848, 5977, 6868, 7310, 8080, 8585, 8686, 9452, 11120, 11696, 11815, 11954, 13736, 14039, 14620, 17170, 17372, 18904, 21715, 23630, 23908, 27472, 28078, 29240, 29885, 34340, 34744, 37808, 43430, 47260, 47816, 56156, 58480, 59770, 68680, 69488, 70195, 73831, 86860, 94520, 95632, 101609, 112312, 119540, 137360, 140390, 147662, 173720, 189040, 203218, 224624, 238663, 239080, 280780, 295324, 347440, 369155, 406436, 477326, 478160, 508045, 561560, 590648, 603677, 738310, 812872, 954652, 1016090, 1123120, 1181296, 1193315, 1207354, 1476620, 1625744, 1909304, 2032180, 2386630, 2414708, 2953240, 3018385, 3818608, 4064360, 4773260, 4829416, 5906480, 6036770, 8128720, 9546520, 9658832, 10262509, 12073540, 19093040, 20525018, 24147080, 41050036, 48294160, 51312545, 82100072, 102625090, 164200144, 205250180, 410500360, 821000720]

約数ペア:

[(1, 821000720), (2, 410500360), (4, 205250180), (5, 164200144), (8, 102625090), (10, 82100072), (16, 51312545), (17, 48294160), (20, 41050036), (34, 24147080), (40, 20525018), (43, 19093040), (68, 12073540), (80, 10262509), (85, 9658832), (86, 9546520), (101, 8128720), (136, 6036770), (139, 5906480), (170, 4829416), (172, 4773260), (202, 4064360), (215, 3818608), (272, 3018385), (278, 2953240), (340, 2414708), (344, 2386630), (404, 2032180), (430, 1909304), (505, 1625744), (556, 1476620), (680, 1207354), (688, 1193315), (695, 1181296), (731, 1123120), (808, 1016090), (860, 954652), (1010, 812872), (1112, 738310), (1360, 603677), (1390, 590648), (1462, 561560), (1616, 508045), (1717, 478160), (1720, 477326), (2020, 406436), (2224, 369155), (2363, 347440), (2780, 295324), (2924, 280780), (3434, 239080), (3440, 238663), (3655, 224624), (4040, 203218), (4343, 189040), (4726, 173720), (5560, 147662), (5848, 140390), (5977, 137360), (6868, 119540), (7310, 112312), (8080, 101609), (8585, 95632), (8686, 94520), (9452, 86860), (11120, 73831), (11696, 70195), (11815, 69488), (11954, 68680), (13736, 59770), (14039, 58480), (14620, 56156), (17170, 47816), (17372, 47260), (18904, 43430), (21715, 37808), (23630, 34744), (23908, 34340), (27472, 29885), (28078, 29240)]