256981010

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^2$

素因数の和:121

約数の個数: 144

約数和(自身を含む): 599064984

約数和(自身を除く): 342083974

約数列:

[1, 2, 5, 10, 11, 13, 17, 22, 26, 31, 34, 55, 62, 65, 85, 110, 121, 130, 143, 155, 170, 187, 221, 242, 286, 310, 341, 374, 403, 442, 527, 605, 682, 715, 806, 935, 961, 1054, 1105, 1210, 1430, 1573, 1705, 1870, 1922, 2015, 2057, 2210, 2431, 2635, 3146, 3410, 3751, 4030, 4114, 4433, 4805, 4862, 5270, 5797, 6851, 7502, 7865, 8866, 9610, 10285, 10571, 11594, 12155, 12493, 13702, 15730, 16337, 18755, 20570, 21142, 22165, 24310, 24986, 26741, 28985, 32674, 34255, 37510, 44330, 48763, 52855, 53482, 57970, 62465, 63767, 68510, 75361, 81685, 97526, 105710, 116281, 124930, 127534, 133705, 137423, 150722, 163370, 179707, 212381, 232562, 243815, 267410, 274846, 318835, 359414, 376805, 424762, 487630, 581405, 637670, 687115, 753610, 828971, 898535, 1061905, 1162810, 1374230, 1511653, 1657942, 1797070, 1976777, 2123810, 2336191, 3023306, 3953554, 4144855, 4672382, 7558265, 8289710, 9883885, 11680955, 15116530, 19767770, 23361910, 25698101, 51396202, 128490505, 256981010]

約数ペア:

[(1, 256981010), (2, 128490505), (5, 51396202), (10, 25698101), (11, 23361910), (13, 19767770), (17, 15116530), (22, 11680955), (26, 9883885), (31, 8289710), (34, 7558265), (55, 4672382), (62, 4144855), (65, 3953554), (85, 3023306), (110, 2336191), (121, 2123810), (130, 1976777), (143, 1797070), (155, 1657942), (170, 1511653), (187, 1374230), (221, 1162810), (242, 1061905), (286, 898535), (310, 828971), (341, 753610), (374, 687115), (403, 637670), (442, 581405), (527, 487630), (605, 424762), (682, 376805), (715, 359414), (806, 318835), (935, 274846), (961, 267410), (1054, 243815), (1105, 232562), (1210, 212381), (1430, 179707), (1573, 163370), (1705, 150722), (1870, 137423), (1922, 133705), (2015, 127534), (2057, 124930), (2210, 116281), (2431, 105710), (2635, 97526), (3146, 81685), (3410, 75361), (3751, 68510), (4030, 63767), (4114, 62465), (4433, 57970), (4805, 53482), (4862, 52855), (5270, 48763), (5797, 44330), (6851, 37510), (7502, 34255), (7865, 32674), (8866, 28985), (9610, 26741), (10285, 24986), (10571, 24310), (11594, 22165), (12155, 21142), (12493, 20570), (13702, 18755), (15730, 16337)]