256843990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:254

約数の個数: 128

約数和(自身を含む): 571318272

約数和(自身を除く): 314474282

約数列:

[1, 2, 5, 10, 13, 17, 23, 26, 31, 34, 46, 62, 65, 85, 115, 130, 155, 163, 170, 221, 230, 299, 310, 326, 391, 403, 442, 527, 598, 713, 782, 806, 815, 1054, 1105, 1426, 1495, 1630, 1955, 2015, 2119, 2210, 2635, 2771, 2990, 3565, 3749, 3910, 4030, 4238, 5053, 5083, 5270, 5542, 6851, 7130, 7498, 9269, 10106, 10166, 10595, 12121, 13702, 13855, 18538, 18745, 21190, 24242, 25265, 25415, 27710, 34255, 36023, 37490, 46345, 48737, 50530, 50830, 60605, 63733, 65689, 68510, 72046, 85901, 92690, 97474, 116219, 121210, 127466, 131378, 157573, 171802, 180115, 232438, 243685, 315146, 318665, 328445, 360230, 429505, 487370, 581095, 637330, 656890, 787865, 828529, 859010, 1116713, 1162190, 1510847, 1575730, 1657058, 1975723, 2233426, 3021694, 3951446, 4142645, 5583565, 7554235, 8285290, 9878615, 11167130, 15108470, 19757230, 25684399, 51368798, 128421995, 256843990]

約数ペア:

[(1, 256843990), (2, 128421995), (5, 51368798), (10, 25684399), (13, 19757230), (17, 15108470), (23, 11167130), (26, 9878615), (31, 8285290), (34, 7554235), (46, 5583565), (62, 4142645), (65, 3951446), (85, 3021694), (115, 2233426), (130, 1975723), (155, 1657058), (163, 1575730), (170, 1510847), (221, 1162190), (230, 1116713), (299, 859010), (310, 828529), (326, 787865), (391, 656890), (403, 637330), (442, 581095), (527, 487370), (598, 429505), (713, 360230), (782, 328445), (806, 318665), (815, 315146), (1054, 243685), (1105, 232438), (1426, 180115), (1495, 171802), (1630, 157573), (1955, 131378), (2015, 127466), (2119, 121210), (2210, 116219), (2635, 97474), (2771, 92690), (2990, 85901), (3565, 72046), (3749, 68510), (3910, 65689), (4030, 63733), (4238, 60605), (5053, 50830), (5083, 50530), (5270, 48737), (5542, 46345), (6851, 37490), (7130, 36023), (7498, 34255), (9269, 27710), (10106, 25415), (10166, 25265), (10595, 24242), (12121, 21190), (13702, 18745), (13855, 18538)]