21530740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:110

約数の個数: 144

約数和(自身を含む): 60060672

約数和(自身を除く): 38529932

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 31, 35, 41, 44, 55, 62, 70, 77, 82, 110, 121, 124, 140, 154, 155, 164, 205, 217, 220, 242, 287, 308, 310, 341, 385, 410, 434, 451, 484, 574, 605, 620, 682, 770, 820, 847, 868, 902, 1085, 1148, 1210, 1271, 1364, 1435, 1540, 1694, 1705, 1804, 2170, 2255, 2387, 2420, 2542, 2870, 3157, 3388, 3410, 3751, 4235, 4340, 4510, 4774, 4961, 5084, 5740, 6314, 6355, 6820, 7502, 8470, 8897, 9020, 9548, 9922, 11935, 12628, 12710, 13981, 15004, 15785, 16940, 17794, 18755, 19844, 23870, 24805, 25420, 26257, 27962, 31570, 34727, 35588, 37510, 44485, 47740, 49610, 52514, 55924, 63140, 69454, 69905, 75020, 88970, 97867, 99220, 105028, 131285, 138908, 139810, 153791, 173635, 177940, 195734, 262570, 279620, 307582, 347270, 391468, 489335, 525140, 615164, 694540, 768955, 978670, 1076537, 1537910, 1957340, 2153074, 3075820, 4306148, 5382685, 10765370, 21530740]

約数ペア:

[(1, 21530740), (2, 10765370), (4, 5382685), (5, 4306148), (7, 3075820), (10, 2153074), (11, 1957340), (14, 1537910), (20, 1076537), (22, 978670), (28, 768955), (31, 694540), (35, 615164), (41, 525140), (44, 489335), (55, 391468), (62, 347270), (70, 307582), (77, 279620), (82, 262570), (110, 195734), (121, 177940), (124, 173635), (140, 153791), (154, 139810), (155, 138908), (164, 131285), (205, 105028), (217, 99220), (220, 97867), (242, 88970), (287, 75020), (308, 69905), (310, 69454), (341, 63140), (385, 55924), (410, 52514), (434, 49610), (451, 47740), (484, 44485), (574, 37510), (605, 35588), (620, 34727), (682, 31570), (770, 27962), (820, 26257), (847, 25420), (868, 24805), (902, 23870), (1085, 19844), (1148, 18755), (1210, 17794), (1271, 16940), (1364, 15785), (1435, 15004), (1540, 13981), (1694, 12710), (1705, 12628), (1804, 11935), (2170, 9922), (2255, 9548), (2387, 9020), (2420, 8897), (2542, 8470), (2870, 7502), (3157, 6820), (3388, 6355), (3410, 6314), (3751, 5740), (4235, 5084), (4340, 4961), (4510, 4774)]