20979700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:122

約数の個数: 144

約数和(自身を含む): 57746304

約数和(自身を除く): 36766604

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 25, 28, 34, 35, 41, 43, 50, 68, 70, 82, 85, 86, 100, 119, 140, 164, 170, 172, 175, 205, 215, 238, 287, 301, 340, 350, 410, 425, 430, 476, 574, 595, 602, 697, 700, 731, 820, 850, 860, 1025, 1075, 1148, 1190, 1204, 1394, 1435, 1462, 1505, 1700, 1763, 2050, 2150, 2380, 2788, 2870, 2924, 2975, 3010, 3485, 3526, 3655, 4100, 4300, 4879, 5117, 5740, 5950, 6020, 6970, 7052, 7175, 7310, 7525, 8815, 9758, 10234, 11900, 12341, 13940, 14350, 14620, 15050, 17425, 17630, 18275, 19516, 20468, 24395, 24682, 25585, 28700, 29971, 30100, 34850, 35260, 36550, 44075, 48790, 49364, 51170, 59942, 61705, 69700, 73100, 88150, 97580, 102340, 119884, 121975, 123410, 127925, 149855, 176300, 209797, 243950, 246820, 255850, 299710, 308525, 419594, 487900, 511700, 599420, 617050, 749275, 839188, 1048985, 1234100, 1498550, 2097970, 2997100, 4195940, 5244925, 10489850, 20979700]

約数ペア:

[(1, 20979700), (2, 10489850), (4, 5244925), (5, 4195940), (7, 2997100), (10, 2097970), (14, 1498550), (17, 1234100), (20, 1048985), (25, 839188), (28, 749275), (34, 617050), (35, 599420), (41, 511700), (43, 487900), (50, 419594), (68, 308525), (70, 299710), (82, 255850), (85, 246820), (86, 243950), (100, 209797), (119, 176300), (140, 149855), (164, 127925), (170, 123410), (172, 121975), (175, 119884), (205, 102340), (215, 97580), (238, 88150), (287, 73100), (301, 69700), (340, 61705), (350, 59942), (410, 51170), (425, 49364), (430, 48790), (476, 44075), (574, 36550), (595, 35260), (602, 34850), (697, 30100), (700, 29971), (731, 28700), (820, 25585), (850, 24682), (860, 24395), (1025, 20468), (1075, 19516), (1148, 18275), (1190, 17630), (1204, 17425), (1394, 15050), (1435, 14620), (1462, 14350), (1505, 13940), (1700, 12341), (1763, 11900), (2050, 10234), (2150, 9758), (2380, 8815), (2788, 7525), (2870, 7310), (2924, 7175), (2975, 7052), (3010, 6970), (3485, 6020), (3526, 5950), (3655, 5740), (4100, 5117), (4300, 4879)]